No known issues at the moment – apart from the odd online repository playing up when installing/updating (very rare). DietPi, while not as extreme as PiCore, is rather slim and writes its logs to RAM by default – sparing your SD card and making it practically immune to card corruption when improperly shut down (read: yanking the power cord. 
).
Nice touch: @Dan_Knight, the great mind behind DietPi, has added RoonBridge to the software install menu – making the installation of RB and the required dependancies easy as… eh… well… Pi.