For me, a large part of vore is consequences; it's the risk and the permanency that really sell it for me. With that in mind, Endo naturally doesn't really do anything for me because nothing is really being lost. It's also repeatable, so you don't get that rush of vore being a final thrill, it's something that could eventually get stale.

Sentient fat is something more approachable, assuming that it is indeed a permanent state change. While the mind is intact, the prey gave up their body, their autonomy, their agency. That still works for me just fine and allows for the pred to offer plenty of little teases as they go about their life.

So no to endo, yes to sentient fat.