If there was a sliding scale from simulationist games to purely narrative games then I think Rolemaster, especially a fully loaded RM2 or RMSS game, would be very much on the simulation end of the scale. Games like FATE would be right up the other end.
My simplification approach has had the somewhat unintentional effect of shifting my brand of RM into the centre ground and I would describe it as on the simulation side of centre.
I think this is somewhat inevitable. If you are going to amalgamate a dozen skills into one meta skill then you have unavoidably lost some granularity or detail.