It's hard to find faults with this amazing game, but here are my current biggest gripes:
1- There is only 1 boss. I'm pretty bored already with Mr. Noughty boy. When can we expect new bosses?
2- Mining gold gives too little money vs. the time invested (2 hits for the lose!), it seems to average just over 4 monies per gold piece on 100% difficulty, so <$1500 for mining 300 gold (a considerable effort) is just too little! I realize this would be hard to balance without also tweaking the double-gold beer and gold-related mission modifiers so they are not OP, but I think it's worth considering. As it stands, my team just ignores gold, which is not fun!
3- I avoid Salvage missions like the plague because it takes unnecessarily long to fix the uplink antennas (especially in singleplayer). You just hold E there for like, half a minute each time for no good reason and with nothing happening. Add to that the time to fix the mini-mules and you can easily waste minutes of your life each Salvage mission just holding E. Please speed up the fixing of the map objectives.
4- Fire caverns map is exceedingly infuriating because even scraping the tip of your toe in smoldering ground (which sometimes is so small you can't even see properly) will make your shield reset its regeneration timer. I think it would be a great quality of life improvement if minor damage from hot ground did not affect your shield timer.
Do you have comments to make on any of these?