It was obviously not built around being powerful.Considering it's brand new it'll take time for new things to come out for it. But companies need to start releasing products that use the USB-C before any others even consider making accessories for it.
That's not how you're supposed to phase in new ports. Did you notice that now USB 3.0/3.1 ports are starting to catch up, yet there's still 2.0 ports and peripherals floating around? That's how you properly phase technology in, you don't just cut off old stuff and expect people to live with stufftons of adapters. You see it throughout the past few decades, DVD+VCR players, VGA and HDMI, plus the whole idea of backwards compatibility.
With this, Apple just said forget it and then put a non-backwards compatible, hardly usable, and otherwise not mainstream port on their flagship laptop, and then further forgeted everyone by not including any other ports besides an audio jack.