I'll state from the outset that I'm an Osprey lover.
It suffers from all the issues you would expect from a first generation production system that is radicaly different. It was never goiing to be as efficient as the theory and business case stated.
That said, if you see a long term advantage to something, and can solve the basics, then the only real way to shake out all the bugs and get real world experience is by deployment.
What the Osprey really does, is just the start of a potentially long term development of this type of system. It has broken the ground, and all future systems will be built with the blood sweat and tears, that have gone into it as lessons.
Rotary and fixed wing aircraft have had then benefit of decades, and the massive R&D associated with wars etc. to help them evolve. As technology evolves, so will the tilt rotor concept and abilities, unless a fundamental concept problem raises its ugly head. It is by and large early days.