Interesting idea, and I'm not surprised that it came up. And actually, I personally wouldn't mind the change.
But before we take that step (again), we need to seriously consider the damage output that flies around these days. Naboo Pilots do 90dmg on their deathshots, nevermind what they do beforehand. The Weir/Tyber combo (winning init with MT) does up to 200dmg (within a Ysalamiri bubble too). Mace can eat anything with a lucky string of 17s. Sometimes it seems like almost every squad has its own version of the Death Star's planet-destroying-laser!
So if we're looking to neuter SSM, then we've got to consider what will hold the game's insane damage output in check.
I don't have a problem with Avoid Defeat being more common, nor do I have a problem with Evade and Parry being more common either. These things are necessary in today's game. Yes, they add more save-based luck; in the RR Team Tourney this year, my Huntress evaded 240dmg (!!!) before finally dropping to a shooter that based her for the sure damage. But that kind of save luck is rare. Because of the high damage output in the game now, there simply has to be some method of avoiding damage (and/or else of healing well, ala Dr.Evazan).
It is clear that "tank squads" are becoming more popular. I think that's a good thing, because it allows more squads to be able to compete. Anyone would agree that the competitive SWM meta is more wide-open now than it's ever been. But what if those tank squads are no longer so durable...then will we see more of the high-activation squads again? The competitive meta is a delicate balance, and one that we need to be careful with.