If Eliza's charge attack is unblockable after purchasing that upgrade, then shouldn't Sekhmet's charge attack also be unblockable?
I've noticed that higher level AI always go into turtle overdrive when you go in Sekhmet mode, and there's no way to break through their non-stop blocking unless you go back to Eliza, which defeats the purpose of even using Sekhmet in the first place.
In fact, most of time it's better to go back to Eliza right away after using a blockbuster that brings out Sekhmet cuz nearly impossible to combo with Sekhmet and you'll just get blocked or thrown.