I was just thinking of some things I found frustrating in DCS and would be nice to have in a future update. I am a relatively new player, so I thought I'd provide my possibly unique point of view (I apologize if some or all of these have already been addressed):
1. The ability to navigate steps in training missions (skip this step, go back to previous step, mute instructor so I can read the text and get through it faster etc.) I often find myself screwing something up and having to restart the entire mission, then increase the sim rate and go through the same steps many times.
2. Having a 'Restart' option instead of just quit in the escape menu. This may be unnecessary if #1 is implemented.
3. Being able to assign axis controls to everything. As an example, I would like to use one of the mini-sticks on my X-56 to move the view, so I can free up my POV hat to be used as the DMS in the A-10C.
4. Create a standard nomenclature for controls (the F-16 says LG retract instead of landing gear retract, which makes it difficult to find when searching).
5. Revamp the mission editor to make it more intuitive. It can be a little intimidating. For example, I couldn't figure out how to get a tanker to transmit a TACAN frequency.
6. Fix the A-10 hud so all the information can be seen (my waypoint data block is mostly cut-off and the symbology is far too dim, it's nearly impossible to see, even at max intensity, against a pale background).