if you guys haven't already, you should check out the stream replays:
http://www.twitch.tv/8wayrun/b/301600308. lots of maxi action, including daishi blowing people up with him.
judging by what i saw, LO B does look pretty strong. LO B on CH gives a crumple stun that gives CH LO B -> RC AB BE -> LI A for a pretty healthy chunk of damage. you can see daishi do it in the match vs hawkeye's natsu at about the 1 hour 25 min mark. looks to be around 25% damage, probably more if you BE the LI A.
also, although there was no way to tell this for sure, it looked like LO B on block is not very disadvantageous into RC, meaning that if the opp hesitates after blocking LO B (due to anticipating the final K) then RC AB might be able to CH, which, if you use BE, will give you LI A afterwards, which is probably around 20% damage total, i would guess? LO B is also safe, and probably gives actual advantage into RC on hit.
so it definitely seems pretty good. if the designers do think that it's maxi's best moves, or even among his top moves, i can see why they'd think that PSL3 might be too powerful, since both RO and BL go into LO. they might not have wanted setups for LO B to be that readily accessible. i know that losing PSL3 sucks and limits the actual variety of PSL options for maxi, but since now that maxi has some real soviet damage from his loops i think that the viable variety of PSL options might actually
increase due to people hesitating to push buttons after blocking a move that goes into stance. for example, think about how much of a risk just doing 4B->LO-> RC was in SCIV. the transition was slow and pretty readable, and committing to the LO B or LO BK was pretty risky. in SCV no one will be touching buttons after blocking 4B for fear of LO B CH, and the quicker stance transitions mean that you might be able to play mind games with a delayed LO B after the 4B on block, causing further hesitation. there are probably tons of examples of stuff like that now in SCV.