For the way I work (as outlined elsewhere), the
Rebuild function is what I miss most of all.
I used it to tidy up my Layers after deleting off parts of a track I didn't want to use. And to me, it's "randomness" wasn't a problem, as there was no benefit to me whatsoever. To be honest, I've never really understood why that so-called randomness was a problem, I'd be interested to know though.
To accomplish the equivalent of a Rebuild in X2 is very fiddly and time consuming. And as well, unless I'm missing something, there isn't even a 'Remove Empty Lanes' option - each and every lane that becomes empty by dragging stuff around or deleting off unwanted clips has to be deleted one at a time.
To me, the current concept of Lanes is almost like just having individual
tracks in a folder sent to a common bus.
I think the whole concept could have been thought through and implemented a lot better.