it does seem like an obvious potential failure point. If a line gets clogged, or the pump fails... I'd prefer to premix it as well.
unless you are running dirt in your 2 stroke oil, no reason to get clogged. pumps also rarely fail... its a common misconception that they "go bad" but they often were ran OUT of oil, and then have to be PRIMED which people didnt do, run it dry then unprimed then POP... then blame it on the oil injection that was not at fault
also have to make sure that the 2 stroke doesnt inject oil directly to the crank bearing- some of the older 2 stroke bikes with oil injection and now lots of the chinese scooter engine ATVs work this way, and carb oiling is not lubricating the crank bearing at all, and will eventually toast the engine no matter what mix of fuel oil you put in the tank
i have double and triple checked the engine cutaways for the kv75 (i have one) and its fine you can run premix. mine has a big metal plate that says AMSOIL 100:1 PREMIX FUEL ONLY and the oil tank has been replaced with a fiberglass cover and a battery box! havent seen another like it yet...