Hi dp,
personally, I think the complaints (if referring to those coming from
outside the world of linux) are mainly about either a) lack of apps, or b)
lack of "plug-and-play" capabilities.
As a linux user for the last few years (no programming experience either), I
suppose it would be good to have things working "out-of-the-box" as best as
possible. People don't like to fiddle around, even though I do..
Having more apps available would be good, of course.
The VST instruments for Windows are in the hundreds, whereas for linux
they're in the dozens. Of course, many of the VST instruments aren't
necessarily all that great, to the solution is probably not in the sheer
"number" of instruments available, but in the quality.
I see many people using non-free instruments (kontact, etc) and I'd like to
see some of this technology spill over into linux. But I think it'd have to
be free, in order to get people to try it. --There's nothing like doing a
linux-based music performance for people who have only used Windows, to whet
their appetites!