For me, my worries expressed back in the summer still stand. The positives are that the upgrade price that I paid has been worthwhile for the bug fixes, and the small selection of updates from X3 Producer to Sonar Platinum. The negatives are that I also got inconvenienced with new bugs introduced as changes happened (mostly in the early months, to be fair), and neither the new features nor the new content has been of much interest to me*. (Aux tracks would have been an exception, although currently my workflow makes them essentially unusable, which is a real shame.) Meanwhile, other things I care about were apparently not on the agenda - step sequencer and matrix view fixes/improvements, MIDI chase, split-with-auto-crossfade, cleaning up or clarifying lasso and area selection (especially when take lanes and folders are involved), some sort of arranger view or equivalent functionality, a usable drum map manager dialog, ProChannel being integrated into the main Track View pane, etc.
Looking forward, seeing what was delivered over the last year, and with the 'up next' part of the Rolling Updates page appearing sadly quiet and certainly devoid of anything I want, it's hard for me to justify paying the same price again to take that gamble.
But, since the model is one where I basically own the software after paying for a year, it's not really a problem. I'll probably just sit back and see what happens, and jump back in if I see a future upgrade worth paying for.
(*I think I use one of Anderton's guitar amp sim presets somewhere, and 3 MIDI clips from Addictive Drums 2... that's about all.)