VPS Phalanx

Sounds like you should have followed your own advice and tried the demo first. I've made the same mistake with plugins myself in the past and not demo'ed them for long enough before buying.

IMO Phalanx is the perfect (one-shot) sampler for daw which doesn't have such a tool. It's not a no-brainer, so it doesn't aim for rookies but for demanding users. You need 1-2 days to get into it, but when you got the idea, you won't find anything better out there.

lacking sequencer, 4-8 layers and time stretching.

It has now an arpeggio and trance gate for each individual part. That's at least a start. I've tried my demo for 3/5 days, and I'm seriously considering buying Phalanx.