I am tired and since you asked, I won't write the great text of China, but I'll point out a few things.
I find the laser effective. Someone hiding up on the dresser? Now the normals can actually deal with a camping boss rather than having to get an admin to. I personally found getting hit by the golden wrench with crits for 9k per strike not fun.
Firebug was too easy to run with. The speed and damage output was insane. Also Blockland is wonky with crouch-jumping and jetting, so that makes them even harder to hit.
Overweight could easily tear down any boss in the game at any given time. It was literally a one-man army, on the wrong team. The spread increase was so he wasn't a better sniper. I feel it's going through a Juggernaut phase and we probably haven't gotten him into the correct place yet.
I'm still unsure if we should've killed Runner how we did. He was the most annoying class ever, and not because he was hard to hit, since it was actually easier than hitting a Firebug, but because of everyone who didn't fight, which brings me to my next point.
The Sniper's SMG is trash. Seriously. I had to stop an argument because it came to mutes since someone was trying to defend using that as a weapon instead of the actual sniper rifle. It does 8 damage per bullet, 10 per clip. You may think 80 damage is really good, but the spread is so wide it's worthless. Not worth using unless it gets buffed.
I could see a "Runner" type class with no double jump having a weapon like a buffed SMG. Except that it won't really work out since you can't dodge any boss in the game, save for Badspot. Or Rotondo. Basically what I'm saying is that it *could* work but I honestly don't want to put that much effort into attempting to save a class that people will hate in the end because it isn't like how it used to be.
I'll add a last note that even though my suggestion to give GS the other watch sort of worked out, it was too easy still for players to use it and hide, and hide they did.
There's my list, hopefully it's not too big.
Didn't see the other post so I'll address that too.
Pretty sure the Constructor has enough items to fill up an inventory and they're still useful since they got a laser pistol sometime. Giving Detonator is a decent idea which I haven't thought of before, but giving Infiltrator the deflector just seems silly. I don't think it'd be worth splitting a class over.