Aegislash, Conkeldurr, Weavile and Dragapult in my opinion. Probably even more.1. What mons do you believe will see increased usage?
Aegislash tended to get outclassed as a special steel type attacker by Magearna. Even tho Aegislash can do a lot more than that, it's hard to want to use it over Magearna considering how much better Mag is at breaking walls and setting up. Aegislash was still a good mon but, it's easy to see that a lot of players did not want use it because Magearna is just flat out better. Not only that but, when Magearna goes for an attack, it still keeps it's bulk.
Conkeldurr having less competition as a wallbreaker will help it shine even more. Not only that but, having less competition as a physical attacker from Cinderace helps too. Cinderace having access to STAB hjk and far better speed really hampered Conk's usage for sure. Especially with Magearna being around which had better bulk, speed and typing. Conkeldurr will definitely be better to use now with all the slower/bulky teams being so popular.
Weavile is an excellent knock off user that has ways of taking on some faster threats for big dmg with ice shard. Magearna resisting both it's STABs definitely did not help its viability. With that big threat gone, it can have an easier time spamming its amazing STABs against bulky cores like Hippowdon, Mandibuzz, Clefable, Corviknight, Tangrowth, Slowbro and Amoonguss.
Dragapult. I dunno. Just been seeing it being used more. Sure, Magearna being gone helps it breaks teams better but, for some reason DD sets are seeing more usage irregardless of the ban.
Urshifu-Dark lol2. Which mons (if any) do you think will be overhyped and have their usage skyrocket initially before dying down after a few days/weeks?
Maybe Blissey and Hippowdon. For sure a few mons will see less usage tho.3. Is there anything that may see less usage now that Magearna and Cinderace are banned?
I think the metagame will get a lot healthier. Better ladder & tour matches for sure.4. How do you think the metagame will develop now that Magearna is banned?
5. How do you think the metagame will develop now that Cinderace is banned?
Maybe Zeraora and Rillaboom. With less common resists for Rilla's Grassy Slide, it'll have an easier time sweeping late game or breaking mid-game. If the metagame shifts a lot in Urshifu-Dark's favor, that could be a mon to put spotlight on next.8. Is there anything that may become too problematic for OU now that Magearna and Cinderace are banned? Don't go overboard with this one.
Thanks TPP. You're a good poster.10. Have a nice day and I hope you all enjoy the new metagame!