Does CW have a beta program? I've been out of the loop for a few years so don't know the current status on that. It seems having a beta program would help in catching some of these "how did they miss that" kind of bugs.
As far as X3d, my limited experience tells me that it is a giant improvement over X1 which is where I got off the bus. My arch enemy bugs, the MIDI crosstalk and crashing with more than one VSTi sending MIDI events have finally been fixed (almost 5 years since originally reported), so now I can do things the way I need to. There are obviously still more bugs and I'm sure many people have their own set of pet bugs, some that even makes Sonar unusable for them, but for me at least I can now enjoy using it.
Anyway, I offered numerous times to beta test, but I never got any response back. And it is not to get free stuff or anything, I'll gladly pay for Sonar if the most annoying bugs can be sorted out.
I do feel it is a little bit unfair to have bugs sit in each version that makes an advertised feature unusable, only to have to pay for the next upgrade to get that feature fixed. It is like buying a 2013 model car and finding out the radio doesn't work. But don't worry, they fixed the radio in the 2014 model so just go ahead and buy that one. I think CW should keep fixing bugs in older versions (say one version back) to be fair to those that paid for that previous version but the advertised features never worked properly. However I understand that at the end of the day it will mean less revenue since people will be less likely to upgrade right away.