General mutation sys wouldnt be a problem if there was no multiply map events and overall Pandoran agression increase over the map.
Problem is original player team can match up, but since mid game second or third team cant develop fast enough to match e.g. teams of Pandorans coming with multiple Chirons, Sirens etc.
So some sensible answer should be done:
a) Scaling threat a bit more to players team responding
b) Introduce partial and slower overall mutations and more things to do, slowing mid to end aggression pace of game
c) Introduce faster base training for newbies or some other level of development
In general, game relies too much on developed scales of players that takes long to build on skill points. A soldier with a lot of strength points and weak weapon is more efficient then newbie with latest gear. Too dependent on skill tree. Either it should be make more late bearable with 1-2 teams or less dependent on skill powers and points and more on gear and pure strategy. To me current mix is strange one. Building and using proper skills and building movement, strength and later on will points is too much of essence. I vote for soldiers improving in using weapons they use (throwing grandes longer, shooting snipers) on its use, more then on some artificial skill tree. It feels too much as superhero RPG in current shape.
More ideas are most welcome.