From memory (not experience), the aliasing you got from playing back things recorded while the tape was moving faster than 1x speed has been fixed, as it was a bug. aliasing is still available by instead recording while the tape is moving slower than 1x (indeed this makes sense: playing back a digital file at a slower rate than it was recorded should result in the bandwidth shifting down the spectrum, further away from Nyquist, whereas playback faster than the recording should push the spectrum up, eventually leading to aliasing)
I think waiting for 1.1 is totally reasonable—the main question is: do you feel like being a beta tester?
(also I know this was a question about the beta, but I think maybe it should go in one of the other W/ threads, since it’s not part of the beta testing per se)