Counter Points
1. What do you mean the fact that Chandelure is weak to every kind of entry hazard doesn't matter? Volcarona only needs to switch in once to destroy a team. Many walls are susceptible to being OHKO'd by Volcarona, but the notion that Volcarona is broken is silly by any stretch of the imagination. How many Pokemon Chandelure can finish off is irrelevant. This is a metagame, if you're not prepared for a threat, then you deserve to lose. Every viable Pokemon can take out a number of other Pokemon with ease. The fact that Chandelure has to lock itself into a move is a both a gift and a curse.
2. How is the fact that Chandelure is a 1 for 1 meaningless? You kill something on my team with Chandelure. I send in something else that can set up on Chandelure because my team is built decently, and I accounted for a major threat in the metagame. Now you're facing a situation where I have a decent chance to sweep your team or put some dents in it. I'm happy with the situation that Chandelure provided. The notion that Chandelure is broken because it paves the way for a Pokemon on your team to sweep is so silly. If that's the case, Dugtrio is broken because it makes sun such an amazing archetype. I mean, Dugtrio can kill Tyranitar and Heatran. Oh wait, Dugtrio has a ton of flaws, just like Chandelure.
3. I'm not going to go into how I feel that Chandelure isn't that good against rain/sand. I generally don't have a problem vs chandelure just because of the way i play.
Before you respond to any of my points, respond to this question.
If Chandelure is so broken, then why aren't we seeing Shed Shell being ran on so many more Pokemon? If Chandelure is as overcentralizing as you claim, surely players will want to escape from Chandelure, thus leading to more Shed Shell usage
I'm sorry, but your reasoning is quite weak, IMO.
1) Volcarona isn't broken because with Stealth Rock up, it is quite manageable and the hazard impedes its ability to do its job, which is to sweep. That and it requires quite a lot of support. Chandelure doesn't need that support. By the time it's come in and gone once, it's quite likely that it's killed off something important. It's done its job, unlike Volcarona. Chandelure can easily do its job with hazards up or not, Volcarona not so easily. If you want to apply that logic, then fine, what about Ho-oh? It's 4x weak to SR, but it gets its job done whether SR is up or not, which is why its in Ubers. While I'm not saying Chandelure is as broken as Ho-oh, my point is that Chandelure easily gets its job done whether or not hazards are up or not, because he doesn't need to switch that many times anyway.
2) Again, I will explain why the 1 for 1 is meaningless. When Chandelure kills something and locks itself into a move that you can set up on (which again, we are assuming Scarf/Specs, which isn't the whole picture), it doesn't mean that you can't automatically sweep their team either. Chandelure's team is also a team of 6. It also has a capacity to deal with whatever threat you're setting up on Chandelure. It is
which Pokemon is removed that is important. Again, your Gliscor got removed by Chandelure. How the hell do you deal with Excadrill now? Say it's early game and you were both 5-5 before Gliscor got assassinated. Now it's 5-4, and you send in Keldeo to set up on Hidden Power Ice. However, with still five Pokemon in play, your opponent is probably still very well prepared for Keldeo with his Latias, Dragonite, Thundurus, Serperior, or whatever he's using to check your Keldeo, while you are now either very weak or at worst defenseless against whatever Gliscor checks, be it Excadrill, Terrakion, Breloom, whatever. Other option is to send in Tyranitar or Scizor (depending on move) to Pursuit Chandelure and get rid of it. Good, now you're 4-4. Again, now all that happens is Excadrill comes in on Pursuit, sets up an SD, and you are now without your Excadrill counter, or at best it is much harder to check Excadrill because you lost your best one. It's not just 4-4, but 4-4 with the momentum very much in your opponent's favour. Basically, if we're talking chess, there are pawns everywhere on the board, and you just swapped your knight for a bad bishop that got blocked by all those pawns. About the Dugtrio comparison, the easiest way to reply to that is the sheer amount of Pokemon Chandelure can trap and kill as opposing those that Dugtrio can. Chandelure can trap and kill half the metagame. Dugtrio even has trouble with those he's supposed to remove, sometimes.
3) Not going to try and talk about this because it's your experiences and I'm not going to try and pass judgement on it.
Now to your final point. Why aren't we seeing more Shed Shell on everything? Firstly, we are. You don't see good players running Skarmory, Ferrothorn, or whatever without Shed Shell any more. Secondly, it may because it is really
impractical? Running Shed Shell on Blissey just sucks. It's almost like an Eviolite Chansey without Eviolite. With sand everywhere, do you really think Blissey wants to go without Leftovers? Even if Chandelure is the most broken mon in the metagame, do you really think we're going to run Shed Shell on every mon and weaken ourselves to everything else? Do you see 2 or 3 of Gastrodon / Palkia / Grass Arceus / Eviolite Chansey on any one Ubers team? Of course not. Is that to say Kyogre isn't broken? Did you see 2 or 3 of SpD Scizor / Spiritomb / SpD Metagross / Cresselia on any one team when Deoxys-A was around? If not, did that stop it being ridiculously broken? If you look at the big picture, you will see that running you can't just run Shed Shell on every mon because your team would suck.
All I can say, mate, is that you're not looking at the big picture. You're more concerned about the immediate effects of Chandelure KOing something and not looking at how Chandelure works with a team or the opposing team.