Team fight Tactics suggestion
I think increasing the pool size for Tier 3 champions from 31 to 39 would be a lot less frustrating. It feels impossible to get a level 3 Tier 3 Aatrox, or Morgana, or Poppy.
I have gone 10-15 minutes trying to get 1 MORE Tier 3 champ that I needed, and never got it. Even when their is only 2-3 people left.
Change Demon up, and reduce Glacial stun chance. Glacial is extremely oppressive, and the rate of the freeze is not fun at all. Because you have Ashe in the back Freezing people, Sej's ult that does an AOE stun + Glacial stun chance per AA, etc.
For Demon the champs needed for Demon are pretty much all tier 3 besides Elise. Trying to go ShapeShift + Demon is depressing because it feels impossible to get Tier 3 Aatrox. Someone else from Demon needs to be lowered a tier(Morgana, AAtrox, or Evelyn) or increase Tier 3 pool to 39.
Change the passive buff from 2 demons, to like 3 demons needed.
Anyways, just my two cents so far outside the obvious stuff like RNG items needing change.