I don't speak for anyone but me, and I am not privy to what and when stuff is approved, but from all I have seen, priority is currently given to fixing things that prevents games from running correctly.
A lot of new stuff is going on with the video support - EGA, VGA, SVGA. I think it was prompted by some platform game (Kelllog something?) that displayed incorrect colours.
There are changes being added that fixes problems with games not installing, running or saving properly. Fixes to the file-system and/or CD-ROM stuff.
There is stuff being changed in the CPU emulation - again problems that causes some games (and 1-2 demos?) from running.
The PS/1 audio card and this Innovation card is (I think?) not something that prevents a game from running, because said games do work with some of the other audio solutions..
And yes, cross-platform support is important too.
Some extra info / guidelines for feature requests:
DOSBox Feature Request Thread
The absolute #1 priority is Game Compatibility. Not Wordstar/Wordperfect or some custom app that you need to print or connect to your host via serial. All suggestions should keep in mind the goal for increasing DosBox GAME compatibility.
DOSBox 60 seconds guide | How to ask questions
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