Even after the Izuna buffs, it takes more HiC Izunas to drop someone in 5U with the life increase than it did before in Vanilla. With his guard break pressure reduced, Izunas are really what you're looking at for your best damage, and yet that's now worse off, too.
So yeah, back to 270. Holds are a very powerful tool, but if you're tossing them out there out of turn, you deserve to be punished bad, especially by grappler characters who typically have to work hard to open you up for those situations.
Then there's Alpha, but don't get me started.