I haven't used Tetra, or either the 4MS sampler or the Morphogene, but taking a quick look the Tetra looks like it'd slot in quite nicely here and actually do a lot more than the Pressure Points. Good call. I can't speak to 4MS vs Morphogene, but to the Telharmonic, I find that I really like putting a module I haven't had luck with into a smaller rack where I can start to focus on it and learn its ins and outs more thoroughly. It does seem to be a well-regarded module, so if you've not had success with it in the past maybe this is a chance to fix that, and if it doesn't work out you've got two other oscillators anyway... That said, either a Plaits or a Rings could take its place and do quite nicely I think.
Whatever you do, let us know, and I hope we get to hear some tunes! Which makes me think, you might want to swap a Disting in so you can record on the go, nice module huh?
my tunes: https://stevehand.bandcamp.com/