1: Aim assist seems somewhat strong on controllers, and aiming in unexpected situations is easier with controllers than with mice.
2: Keyboard and mouse have some advantages, but they take a lot of time to build the skill needed to use those advantages.
3&4: Lag or a bug.
5: Some of it is bad, and some of it is good.
6. There are not enough items to unlock in a season, and it takes too long to reach the next tier.
7. What was the complaint with the friend-or-foe system?
8. No player collision with teammates can be good or bad, but no player collision with enemies is always bad.