| Level performance is maybe the wrong way of saying reducing costs, i.e. big R&D budget and expensive tech. doesn't mean you buy results.
If you limit the revs on the current engines wouldn't you reduce the speed for the cost of a limiter system rather than having to design a whole new 800cc engine?
"Samey" bike engine performance is no bad thing? There are plenty of other things to spend cash on, the chasis, tyre development, and more importantly the best rider!
Having said that, at the top level it's not always about cash it's about the whole package unless you have a specific mega advantage in any one area.
The reason for going 800cc is to reduce power/speed. Rev limiter does that for the fraction of the cost. Sure engine development will still go on but be focussed on making the best usable power up to what ever the rev limit is.
Ray. | 
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