Sorry for this late answer but your mail was at the very end of my stack of (thousands of) unread messages when I got back from Hawaii...
You're right this could be a good idea to ask our users what they want to see in the future versions (1.4+ and maybe 2.0+).
Maybe what we could do is open a page on the wiki (and website) we can discuss the next versions of Studio, and categorize and prioritize the new features, improvements, etc.
Then, we could send a mail on the users ML *and* also, in order to get feedback from more people, have something on Studio's website indicating that gathering features/improvements requests from our users for the next versions of Studio.
Unfortunately, I'm currently working on a contract that keeps me very busy (and will keep busy in the next 3 months) so time for introducing new features will be lacking I think.
There's one thing I'm really want to do and that is going to be a great improvement is add french translation to Studio. Thanks to Felix who, once again, has done an incredibly job on externalizing all the string in Studio and organize them in property files (I can easily imagine how hard (and boring...) this should have been), it's now very easy to add any new translation. Felix has done the german translation. I will do the french. Maybe we can ask our users if they can/want to do other translations too.
I really think this should be one (maybe the only one, if we want to release the next version soon) of the most important highlights for this new version.
Of course, we can also add to the roadmap the usual minor bug fixes.
Studio 1.3.0 has been released last week, and it's a good news. Since we released it (9 days ago), more than 1800 dowloads have occured (this is 200 per day !)
Its time to start working on 1.4.0, and it may be interesting to get some feedback from our users, and also gather the ideas we have at Directory, compiling a roadmap for the next version, and may be for the version after the next version.
Maybe it could be a good idea to ask the users about what they want to have in 1.4.0 too (I'm currently only posting on the dev list).