I'd really like to support some limited mod availability for this game. Macros on the other hand really should be in there.
So you know where I'm coming from on mods, I played WoW for 7 years (FFXI before that, speaking of macros). The only mods I used were: The ubiquitous damage meter, a mod to autosummon my vanity pets, and Power Auras (http://www.curse.com/addons/wow/powerauras-classic if you're unfamiliar). Yes, I raided perfectly fine without any more mods than those.
Power Auras is the only thing I miss while playing SWTOR, the others I can easily live without. If things die then I'm not looking for a Damage Meter to tell me how efficiently I managed it. However, with any proc based class or cooldown based class (I'm looking at you, tanking Sith Assassins), I find myself staring at the 4 pixel square boxes above my status bar instead of at the actual action on screen. That's what Power Auras fixes, and I miss it greatly. I don't need mods to play the game, but they can be such an incredible quality of life fix.
As far as macros? My bar is full. I've been trying to avoid turning on both left and right bars so as to not take up so much screen real estate, but my bars are full. Therefore, I never use my relics. I know I should, but I just don't have room for them. I just want to macro those into something so I can keep my bars cleaner.