Too much grinding, especially once you "reach the core". The plasma resource is just too scarce. If you are lucky you get 10 in 1 run, which is good enough to buy 1 small upgrade. Heaven forbid in the zone before the core you get screwed(like I do quite often) by a giant wall of lava bricks 10 bricks wide that can kill you almost instantly. I thought I was going to go for the last achievement, but in the grand scheme of things, it's just not worth it, because there are better games to spend that much time on.
Not being able to sell a tower whenever you want is quite frustrating, stuck with several cars that it won't let me forge because they are leveled, yet i have 0 use for... this seems like game mechanic that should be improved.
My 3 forwards are all over 50 rated, i have scored like 1 goal in 5 matches, yet teams who have forwards rated in the 30's, have scored 15 or more goals in that time frame.... isn't this supposed to be a "simulation"
Thought they fixed the injury algorithm, but currently sitting here with 20 percent of my team injured. All of which were starters until they got injured. About ready to find a different game to waste my time with.