It depends on everything you got on your current account.
If you have several characters, a lot of silver, a used Token, a lot of things that can’t be traded (hair dyes, hairstyles, other kinds of untradable items, special titles, TPn bought character slots…), it’s not really worth it.
But if not, sure, it’s rather worth it.
With all the x8 exp tomes, instances resets, warps, etc., you can get to 330 really fast. Even without playing too much you’d get there in a couple of days… But to me the best side is that 4 characters will receive all those boosts, so you can level several classes.
If you’re not too ahead in game yet, it’s a nice way to boost your leveling. I mean, you can still try to level the normal way, do the main quest lines, and just use all the boosts from time to time without rushing. It’ll just make it easier for you whenever you feel like “I want to be next rank already !”.
And at some point you’ll be able to give to your newly made account the SS and BB, just be mindful of the fact that no Token means it becomes untradable, you can’t log on two Steam accounts at the same time, and you need to wait about a week for the market restrictions to be lifted on a new account.
Note though that all the 300+ quests exp cards give A LOT of exp. You can get from 300 to 317 just doing a couple of maps.
It’s a slower way to level, but it doesn’t take that long. And there isn’t really any reason to rush to 330, in the end.