Power isn't a huge concern, although it's a battery powered device, so having a longer battery life is a plus without needing to include a larger capacity battery.

I'll look into the nRF5. I've been using some of Nordic's code to test and build my prototypes already, although I feel like adding a proprietary profile on top will just make it harder to interface. Once I make the connection currently, all I need to do is enable notify on the specific characteristic which isn't too complicated (just a lot of code to actually get the characteristic)