#1 - I do enjoy the game. Mostly. There is a significant lack of things to do at higher levels, though.
#2 - As stated by others: Leveling alts is great for their class story. Beyond that, though, it's the same thing over and over again. The worlds seem sparse.
#3 - Lack of people. I play late at night and my server is dead. During prime time it seems there's plenty of people on the fleet, but nothing really going on in the game.
#4 - This one is going to sound weird. I realize the game is called "Star WARS", but even in war there's some pleasures to be found. This seems like one long grind from 1 - 50. Isn't there a pleasure planet for a little R & R?
#5 - The more I craft, the more I hate to craft. In WoW I spent a lot of time harvesting mats, but could do it while I was adventuring. I could fly to the city and take 10 minutes or so and knock out the crafting I needed to get done. Here? Oh my gosh, craft 5 things and 8 minutes a pop, then have to Reverse Engineer them and HOPE you get a proc. Then start the process over, but now it takes much longer. Or, worse, you get a proc, but it's not the one you want/need.
That said, I think the game has untapped potential, but it needs to step up and deliver.
I did unsub. After the free 30 days I'm officially done. Though the reasons listed above are big, they aren't my primary. My better half got hours cut at work and we're cutting back on some of our pleasure activities. The game, unfortunately, doesn't hold enough interest to warrant the $15 a month right now. I do hope to be back in the future, though, so, no, you cannot have my stuff.