Some huge completely unnecessary annoyances.
It should save after each wave. Plain and simple. The fact that it doesn't and that death can sometimes result in being sent back 2 or 3 waves was asinine and infuriating.
It's completely illogical that I can start reloading and then initiate repairs and have them both go at the same time, yet if I'm repairing and initiate a reload, it pauses the repair. This was obviously an oversight on your part. Either we were meant to be able to do both at the same time, or we weren't and you overlooked the reload-then-repair case.
The upgrades were unsatisfying. They increased your abilities by too small of an amount. Especially first tier. Why even have a first tier if it's so pointless? Why not just have first tier be second tier and have it cost two points? Blizzard learned late in their design cycle that filler talents were bad design. Are you an immature enough game designer to not learn from industry lessons?
My biggest complaint is that you are a studio. A for-profit studio. I HATE when for-profit studios post on NG. You guys are greedy, corrupt, and dedicated to a freemium model that DISGUSTS me.
You won't even read this review because you could not care less what we have to say.