Well, the 2015 WR250F *might* be the R2 upgrade that I have been waiting 6 years for. Consider:
PROS:
6 speeds
KYB Suspension, rather than the sorry stuff on the R2
E-Start - which means a battery and alternator with more output than the earlier "F". Certainly enough for added horn, turn signals, gps, etc.
Retail price is *within reason* IMO
CONS:
Yes, it will be titled as "Off Road", but there are ways to get around that.
30 day warranty. I don't know if a YES plan will be available in the USA
UNKNOWN:
Does it have a balance shaft? If it does, and is smooth like the R2, I may well convince myself that at 25K miles my R2 is ready to either sell, or be repurposed as a street only ride.
A short ride on the new "F" will be all I need to determine the vibration level. The R2 has spoiled me, and I can't go back to the cement mixer singles that make me want to get the ride over in an hour.
Hope springs eternal.