Umm, the net effort of farking with the evo limit is 99.99999% alien win at S3. Period.
The ONLY thing between S3 aliens and decisive victory is the fact that a alien can't "store" more than 1 (almost 2) tyrant evos. Ever notice just how many kills a typical tyrant can get as S3? It tends to be quite a lot, because they can actually reach poorly armed humans INSIDE their base when they're doing turret-killing runs, and drive-by charges can often kill a couple of non BSed humans. BSes probably get fewer kills before death, AND their maxed out equipment is still one on one no match for a tyrant... which isn't to say that a shotgun rambo can't kill a tyrant or anything, cause it's all based on skill, but tyrants have an easier time going about it.
A good tyrant player will already never really run out of tyrant evos... he just needs a single kill after he dies to get another, which would be forthcoming shortly. If you could rack up 40 evos, though, that's 8 whole tyrants you can essentially store without needing to kill anybody. At least as it is a ty player wants to make sure he doesnt run out of evos by doing suicide base runs, instead of spamming out of his evo bank. And just one bad run with a ty, which happens to everyone, would stop his streak.
The same goes for humans in some ways, but the overwhelming advantage of increasing credit/evo limits goes to the aliens.