Yes, you heard the title right!
Instead of starting a new character from zero, you can transfer all the loot you have collected so far with your main char to your new char and experiment with different builds much easier. This works as of 1.05. Below is the video showing how, via the Bottomless Box:
Pretty incredible, knowing that you do not have to start from scratch for a new character, but can benefit from all your hard work in a brand new game. Sure, it would make the new game much easier but then, it also makes it easier to experiment with different builds, whether for PvE or PvP. Enjoy! =3