Going to go over 2 (3?) of the mons I find the most "interesting" as of the latest bans:

This mon is... very interesting. It takes everything a bulky water would want and packages it in a Mon with 100/115/115 defenses. Just to list its common "Convergences":

Regenerator, Flip Turn

Take Heart

Water Spout, Rapid Spin

Drizzle

Marvel Scale, Recover, Haze

Stored Power, Acid Armor

Adaptability
On top of Scald (it naturally has that already). It's def a staple, even after the funny Liquid Voice Boomburst set got axed.

/

Another bulky ASF Mon that now has everything it wished it could have. Azelf... it's just Mew but with better offenses.
Again with the things they (should not) get:

(Notable Moves) Nasty Plot, Dragon Dance, Volt Switch, Close Combat, Body Press, Swords Dance

Lumina Crash, Roost

Regenerator, Magic Guard

(Gifts to Cresselia) U-turn, Knock Off, Stealth Rock

Psycho Boost, Recover, Spikes, Stealth Rock

Meteor Beam, Photon Geyser

Unaware

Magic Bounce
I honestly think these mons should be on the watchlist, basically every team
should have one of these mons due to their versatility.