Nvidia hasn't done well in DX12 so far and have yet to release the elusive Async Compute drivers for Maxwell while selling them as supporting it. Considering async compute is one of the core engine features for increased performance and lower frame times that is a huge missing feature.
That isn't a feature that developers have to avoid though. Anyone can put it in their engine and if it's not supported or causes issues on certain hardware it can be effectively ignored by the driver.