Upgrading from fiio e12 (mont Blanc) to btr17, actually worth it?

I love my e12, I replaced a battery a year ago after a decade of service, it's power output is nuts for such a small thing, and although it doesn't have balanced output, I don't have any balanced earphones either..

But I like the idea of no cables between phone and dac...

Is it as upgrade or a sidestep with extra features?