Killbox
Sorry to disappoint, not sure about rotary, but no FW OCU will 'snap you up' with 2 years to go. By the time you've applied, got in, done some sort of short occifer-type conversion course, you'll presumably have a lot less than 2 years, in which case it would not be worth their while to put you through an RAF flying course.
Normal amortisation is 3 years from finishing OCU; I've got chums who have crossed over from other services who have to do 6 years, although I don't know their exact terms.
Best of luck.