Please fix the following, in no particular order:
Add a global/server-wide chat for Flashpoint groups. Otherwise, create a Flashpoint queue system along the lines of the PvP queues.
Allow speeders to be used in spaceports and orbital stations. Running through big open no-content spaces is boring.
Get rid of orbital stations. Other than one encounter for the Jedi Knight, I have not seen a use for these time wasting, resource consuming, worthless zones. The Jedi Knight encounter can be rewritten so that it happens upon leaving Tython at the appropriate time.
Fix all of the broken lore, species, etc. codex items.
Fix the twitch-fest pipe-crawls for datacrons. Nar Shaddaa is the worst offender for this extremely annoying mechanic.
Either get rid of the trash vendors (heavy, medium, and light armor, plus weapons) or give them something worthwhile to sell. A useless vendor is just a waste of computer resources.
Give the social vendors some medium and heavy armor items.
Add auction house kiosks and banks to more planets.
Add more cross-faction auction house kiosks. So far, the only one that I have seen is on Nar Shaddaa. If not, then quit providing other-faction items and recipes to players.
Increase the chance of finding recipes, especially lower level recipes at higher levels. As the server population grows in the number of high level characters, the lower level recipes become rarer (at least on my server).