I think NCSoft (and Cryptic at the time) opened the Pandora box when they realized people were willing to pay 5 euro for a new costume, a few emotes and a pretty much useless (but sometimes fun) power, they realized there was a huge cow to be milked there, in fact, devs even stated they had been able to implement extra content for Issue 12 due to an unexpected income amount from microtransactions (those were the days of Sister Psyche and Manticore's Wedding pack).
Microtransactions are also probably what keeps CoH running still today, despite going F2P, they're adding new powersets that have to be purchased even for regular subscribers (via direct cash or veteran point rewards, which are cash nevertheless) so it maybe suits a game like CoH which seems to be heading towards the end of its lifespan.
This game has a standard monthly fee that should cover for any new content plus the box is expensive enough for what's been delivered so far. I'm not a doomsayer but 55 euro for a game missing key features any MMO out there already has (and yeah, I know WoW at launch didn't have all the features it has now, but SWTOR is trying to compete with WoW today, not 7 years ago) is a lot of cash and I don't want any extra expenses added into an expensive enough game so nay to microtransactions.
There are quite a few things SWTOR could adopt from CoH (and other games), specially to increase social interaction among players, but microtransaction system is not one of them.