Several years ago they recruited individuals such as yourself with the promise of a "fast track" upgrade. Boeing 75/76/74 skipper and you're in. A number of people joined with that promise made. And of course......that changed. Now they had to wait until they had the requisite 2500 hours on EK type, AT EK. From my perspective you will have a minimum of 4 years in the RHS here before getting the chance for an upgrade. Just too many guys here already in the que. Really, I would think 5-6 years would be more accurate. As far as a career goes, left seat time on a large a/c (>55 tonnes, re. 737,320), will always trump most RHS time, IMHO. Being in the left seat opens many more doors, even within one's own airline, than being in the right seat. If so inclined TRE, TRI, projects, whatever. All designed to fill a CV for possibly the next job. Again, just my opinion based on a couple of decades in this industry. Good luck.