Don't expect too much out of Reason's sequencer, this is what you can do:

- play, stop, record, forward, backward
- loop
- write notes
- delete notes
- copy/paste
- zoom in/out
- change tempo
- turn metronome on/off

That's about it.

Oh. and quantize

I still have refills from all the way back when Reasonstation was a thing. Type Doru Malaia and many more. If you are looking for something of that era, post it here and next time I am around I will check if I have it.

Surge XT crashes Reason 12.5 for me too. I am on WIN 10.

But only the VSt3, the VST 2 loads fine.