I guess everyone knows now that the only Defense upgrade to get for an Onos is redemption since it makes you quite literally invincible. Unfortunately (well, of course) it's super unbalanced. (This was a problem ever since 1.0 but nobody noticed because Onos usually didn't come out until everything was over.)
I'm guessing redemption works by running a "redeem" test every few frames after the players' health drops below a certain % of its original health. The big problem is that the Onos, having a giant amount of health, has a lot more health in between this % and 0. So you end up seeing Onos never dying at all in a round.
This devastatingly steepens the "slippery slope" now that Res-For-Kills is in the game. Basically, an Onos accumulates so many resources by killing marines and redeeming that his resource intake far outnumbers his forseeable resource expendage for re-evolving. (In other words, killing the Onos ought to set back the alien team a bit simply because they've lost an Onos; however, the Onos will have gotten so many resources that he can re-evolve upon respawning, thus only taking time before the cycle starts again.)
I think Redemption has to be rescaled or revised. The simple idea, ie lowering the chance of redeeming, might work against Onos, but basically screws the other evolutions because they have such a small amt of health between this % and 0.
I have two ideas:
1) With each successful redemption, the % chance of you redeeming again lowers by a factor of a quarter. For example, freshly evolved: 75% chance; One redemption: 56% chance; Second redemption: 42%; 3rd, 31%; 4th, 24%. After four redemptions, the Defense upgrades are reopened at lower strengths, allowing you to evolve either 75% Carapace or 75% Regeneration; however, you can't reevolve Redemption (you will keep having to contend with a dropping chance of redeeming).
2) Forget teleporting back to the hive, and just cause the player to generate a xenocide upon death. Power of the xenocide depends on how much energy the player has at the time of death.
In short, stop just looking at screenshots and thinking "JESUS CHRIST! THAT ENGINE IS PERFECT BECAUSE IT LOOKS LIKE x GAME! MY COLON EXPLODED!"