i just wanna know, what makes milktank BL.....
		
		
	 
 
Me too, and I'm glad somebody else has finally brought her up again for discussion as maybe this time we can get a convincing argument for it being there.
 
The last time she was discussed (page 15 btw), Forsety gave three main reasons as to why it was BL, but none of them completely convinced me and I'll explain why. They were something like this:
 
1. She is very well-rounded and versatile, much more so than Kangaskhan.
 
This is most certainly true, her stat distribution alongside her movepool does make her able to perform a range of tasks with no glaring weakness, however I fail to see why that makes her too good for UU. She makes a decent physical wall with 95/105 HP/Defense and recovery, but with a lack of good physical resists (Fire, Ghost and Ice are mostly special) she is far from unbeatable and certainly no Cresselia in that department, whereas Curse works decently with her but makes her slow and vulnerable to any number of strong special attacks from anything with half-decent speed. The inclusion of Choice Specs and Life Orb this gen has really nerfed her ability to stick around for long periods during a battle.
 
2. She makes a great Cleric.
 
I agree, she does, but so does Meganium for example, who granted has more weaknesses but more balanced defenses and better resists to make up for it. In fact it is probably better for times when for whatever reason you have a Soundproof Pokemon on your team. Anyways, my point is is that I don't see why being able to Cleric makes you unbalancing in UU. Why do we want to remove status healing in UU? In my opinion, having a wider selection of Clerics in UU would serve to make UU 
more balanced, as it would help stop potential double status Pokemon such as Ninetales and Butterfree from crippling a huge chunk of your team early on permanently, or perhaps Dunsparce flinchax, you never know. 
 
3. Miltank can fit into just about any team and not be at any immediate disadvantage, which sounds like OU to me.
 
Again, I couldn't agree more about the first part, she can fill many holes in a lot of teams with her versatility. However, why does that make her too powerful for UU. I've already mentioned her well-roundedness, but if you ask me, in terms of raw power in UU (which is what this discussion is really about), she is a little 
too well-balanced for her own good. For all the things that she can do, with the possible exception of Cleric, there is at least one other Pokemon in UU that can do it better. It may well be able to fit into any team without major disadvantage, however, I'd like to see or hear one example in which its inclusion in a team would give that player an 
unfair advantage against the opponent.
 
I must admit, if Miltank were UU it would probably be used A LOT, but that wouldn't mean a thing as far as its tier placement is concerned ( after all, Blissey is used on nearly every team in OU, but its not Uber, and never will). What is important is whether it would overcentralize the metagame or not. If it would then by all means keep it in BL, as long as the reasons are well justified.
 
Sorry for the long post, I just feel quite strongly about this matter.