Thanks for asking for feedback!
As a person who has played since the beginning of the game, I am frustrated and sad that most everything goes into PVP (which I hate) now. Focus on more story content that doesn't require other people for those of us playing solo. What I love about TOR is the open world rpg.
Fix all the codex, or just grant the codex and xp for all the old, and broken ones. Achievement chasers (like me) get really frustrated at being denied the satisfaction of completion when codex are messed up. There are broken codex from the start of the game.
Fix Felix to quit using Zenith's voice.
Allow guilds to be created with two people.
Allow subscribers to bind their gear to their legacy, not just character.