A good assisted knife is just fine, IMO. Less chance of fumbling the flip, for one. And autos aren't legal everywhere. (Pity).
However, the ones I've liked are few and far between. The ZT0357 is excellent, IMHO, as is the 0770CF. The BM890 Torrent was also good, as was the HK Nitrous Blitz. Can't stand the little Kershaw Chives and even Leeks, just too small and fiddly for me.
I'm undecided at this point on my BM Mini Valation. It's a bit slow, but the blade is pretty stout, and I don't need it to fire like a rocket, it just has to open every time. I had a Large Emissary, and while it was a beautiful knife, it did fire like a rocket, but I felt it would eventually beat up the frame / scales. Probably, it would not have, but that "THUNK!" when it locked open was disconcerting. Like it had too much spring for its weight. It may be that Axis Lock assists to me are kind of an answer to a question that was never asked. Makes more sense on a flipper.