First of all, I never said it would be hard or difficult to implement. Just that many things would have to be changed in order for it to work properly = time consuming. I listed some of those which I think would come up as issues if swimming were to be implemented. And yes the whole armor thing would become a big debate. I guess slowing them down by x % would be a solution, but don't tell me it wouldn't look stupid if
this guy was to swim around with that gun.
The argument "because X had it then SWTOR can have it" doesn't really work. In my opinion they need to justify having swimming in the game with more than just a few stupid underwater (gather) quests. WoW somewhat adressed this issue by having the druid's quest line lead through the water - quite ironically that was to obtain the water form, which never became useful afterwards. And that brings me back to SWTOR. What do we gain from added swimming? If it's just a few gather quests and some holocrons then I'd rather they focus on the other things and ship the game.
With all that said, I'm certain we'll see swimming implemented in an expansion that also includes Naboo. Not that I'm looking forward to it, but it's almost a certainty.