I like Batty, Pilimai & Fevaleaki quite a bit. (I also liked Tofa a lot a couple years ago though, so who knows?)
As for being physically ready for a D1 defensive line, though — Tofa & Fevaleaki — certainly both look like MUCH more natural fits for a D1 line than did Devin at any point last season. Where Batty & Pilimai are at right now I have no idea.
Hopefully Tuiaki is right on this Fisher kid. Our Dline could certainly use a surprise from somewhere (&, yes, I'm confident Devin Kaufusi had no chance of being that surprise this year; it's no small reason why he left, I think).