Yeah, but this is only for the “real” bpm to be displayed in the song settings. The song from Renoise should sync perfectly with other hosts at any speed, as long as you know which is the bmp of your song. (This wasn’t the case prior to v1.8.)
I use speed 4 all the time. Renoise syncs perfectly with other programs, like Cubase.
But if you’re saying that the whole bpm issue in Renoise is not so straight forward as in other programs then I agree, of course. The very existence of speeds in Renoise is a proof of it.
Yes, that’s exactly how 1.5 behaved. With 1.8 it works fine.