Yup, with the new skill a sword main is probably more attractive, but still, you have to be level 100 to unlock the new main skills. Which means you're pretty much gonna be gimped till then.
Also, later on if you do get a lady knight, she's going to have much better stats (and therefore, will be a much better tank) than your swordie, I guess? Then again, these things are only relevant if you're extrememly keen on PvP. I think a sword main can function just as well as any other main in PvE.
It's the nature of my circuitry.