In addition to the offline thing, is also the no crossfaction chat, and that some of us are not playing regularly. I personally have loved the new STO stuff and have not pay much swtor, due to the lack of new story content in swtor.
The crossfaction lack of chat is what i would say is really the worst part of it. In sto i can play my kdfrom, hear someone needs help on a fed only mission, swap and help them, i cant do that in swtor. Although i can use teamspeak to cover that, not everyone has teamspeak, especially possible new converts.