Forceblast - minor change to a wimpy power
This change is actually pretty significant, because removing the tie between damage and knockback makes it useful for low damage characters. Before, if you wanted to do any kind of worthwhile knockback you needed someone who did a lot of damage, but in that case it's always better to just to deal the damage. Now you can use cheap characters with a damage low enough you're willing to forego it, and still have a chance of getting a knockback that's big enough to matter.
HSS - nerf it! nerf it! yeah!
It's about freaking time, too.
PW - that one's confusing to me. Could you use it before if an emeny wasn't in range?
This was a common tactic for abusing characters with an activation click--fire off a pulse wave on the first turn, and knock all of your Hulks and such into their best clicks without having to push them or risk early damage.
Support - yes! BIG YES!
Yay!
Shapechage - now not the weakest power in the game. Is it exactly like Super Senses then?
It would still be weaker that Super Senses, because the attacker can retarget somebody else; with Super Senses the attack just fails. Not the best change, in my opinion, but still better than nothing.