1 The game doesn't register an assist if you "just" destroy enemy mods. I empty my gun into the guy with the front blockade, and someone gets the kill, fine, whatever, but why don't I get the assist? 

2 Another annoying bug is the kill cam. When someone kills you, the camera often switches to their previous mech, which is dead already. 

3 A bunch of maps have awful corners where you get stuck if you get too close

These are just from the top of my mind, I know there are more 

Answering 2 [imortals]: Cheetah's mines are designed to stay even after the mech is killed, so that any unsuspecting opponent who killed Cheetah would get damaged by the mine (and if the opponent had low HP) it would lose HP and get killed by the mines. It's just Cheetah's retaliation style

And coming to [Iceman]: Destroying MODs do not count either as kills or assists but treated as Damage. This is because Mods are made to make the mech survive much longer by giving them shields, extra HP or damage nullification. But still, these mods are pretty easy to destroy and if you might have took more than 3 seconds before ur ally kills the enemy, ur assist will be not considered because u stopped shooting (i.e assisting ur ally in killing the enemy). Hope this helps :)

The other bugs you've mentioned and I haven't answered to still persist, and sry; I don't have any valid reason to stand in favour of the Mech Arena Team for those unrectified bugs, hope that'll be fixed soon in later updates. 

I face a problem in ONSLAUGHTS where when I try  to start an onslaught, a pop-up comes repeatedly and disturbs me mid-fight. No mater how many times I snooze it off, it comes back again, saying "Your rewards will be lost if you quit onslaught. Proceed"

It's great if people want that, but a mod, Crystaldrew, told me that is not suppose to happen. They are suppose to detonate when the cheetah dies. It doesn't say anything on the description of cheetah about what you said. Unless another mod wants to come and tell me that drew lied about it or doesn't know what he is talking about, fine. But either way, all that info should be in the description of the mech in the game.