There is no doubt, as Ian wrote earlier, that RTJ Sr. has had an enormous impact on GCA for a very, very long time, and that impact continues to last long after his death. For the longevity and breadth of his influence he should never be underestimated.
I personally find myself of two minds. Conceptually, I do not care for the themes he is associated with, "modernizing and toughening" of some of the classics.
However, the RTJ Sr courses I have played - admittedly a small slice of his work - I have very much enjoyed. In particular, Rivershore in Kamloops, to my mind is a tremendous member's course that makes terrific use of the land forms given to the architect, and the two Kannanaskis courses in the Rockies are very enjoyable and visually stunning, although a trained monkey could design a great looking course there, given the scenic backdrops.
I also had the pleasure of playing and officiating at Eugene Country Club this past summer and thought it a very good course. I suppose to summarize, I admire his ability to craft a challenging and attractive course but the work I have seen has a certain artificiality that I think detracts from the final product.