Bit of a rant perhaps but after playing some TT rounds last night in GW2, and having mixed results; I joined near the end of a match in Zomburbia, did alright, then again and the zombies were spawn camping so hard that it was a nightmare, then 2 decent rounds, and then the lobby had filled back up after dropping down, we were doing well attacking Great White North and first 1 then another hacker joined and ruined things by playing that Imitator plant, a Gig-Torchwood doing insane damage even for a boss, and summoning Baron Von Bats bosses on defense. I took a screenshot and reported them, but at least one of those accounts was level 0 so likely someone's alt account just to mess with the game so even if they get banned, I'm not sure how much that will help.
Now there's some things that BfN did that really need to change in a new game, like how a Citron in the game with a single sunflower can be a nightmare to take out, and how some maps are just too spawn camp friendly (besides Giddy Park), with multiple Citrons with their extremely powerful shields, can take turns blocking for each other and make playing the zombies on maps like Preserve Pastures, normally my 2nd favorite TT map in BfN, horrible.
In GW1, again without hacks, Peashooters and Foot Soldiers dominate by getting to heights that most/all other characters can't. I love Cactus Canyon but when that map is redone for a new shooter, you need to do something about the super high rocks at the first point where Toxic Peas camp out and it can be impossible to hit them back with any regularity. There are other spots like this and terrain exploits I've seen in BfN where one player continuously gets to heights you can't normally get too (I've tried in private matches), so these need to be fixed as well.
These are a few things I really want fixed for a new game; make it as close to impossible to hack/cheat/exploit as possible, make healing useful but not as OP as it is in BfN, make spawn camping as close to impossible as you can, and reduce the power of shields for characters like Citron. At least for the All-Star, you can get under the dome and take out the dummy, and I don't want shields removed completely, just not so oppressive, especially when combined with BfN's extremely powerful healing, that gives less XP than the GW games. I do want verticality in my maps, as it adds a lot of tactical depth, but not where only a small chunk of players can use it and you can't get an angle to shoot them back.