Giving these a read, not sure I'm keen on including Mech's with just 0 MP due to damage as Immobile (just because they can't move fast enough to really leave a hex doesn't to me mean they aren't still moving about within the hex or even a bit in place).
The rest though it seems like their intent is to adjust and diminish some of the overly punishing rules/situations of the game, and for that I'm all for them taking a look at it. Like ammo explosions, things like falling over could result in a humiliation conga that could do more to take out your mech than weapons fire does. ("I take two actuator hits, I need to make two piloting rolls, more rolls mean greater chance to fail, I fall, my MechWarrior takes damage, I go to stand, fail, fall, take more MechWarrior damage, and before you know it my pilot is unconscious and the 'Mech is out of the fight due to something that looked like a banana peel incident" kind of thing.)
I'll take a closer look at the quad rules later on. As a quad-lover who thinks they often get the short end of the stick, I hope that this is favourable to them.