I think Wilson was solid. If he had a weakness, it might have been that RTJ managed to win the PR battle, and we know he put a lot of effort into elevating himself, being quite good with the press. I am not sure Wilson was. I'm not sure when he became a big alcoholic, but that may have been a factor in that and the decline of his reputation.
I view the biggest weakness of Wilson's plans to be typical of the era. His hazards was limited to sand, water, trees, and lawns. They never considered fw cut chipping areas or even a different bunker style, i.e., the occasional waste or pot bunker. He was also consistent in having elevated greens with semi-gentle upslope on fw approaches, ranging from 5-15%. Truthfully, I find those more attractive than ground level greens, although it certainly reinforced the aerial game, also typical of the era. IMHO, his greens were typically over defended, if that is such a thing.
The other thing I have said about that era is that they were so technically solid. I have never seen a Wilson bunker that had water draining in it, which I find occasionally to regularly lacking in some design/shaping today. On the other hand, they didn't do a lot of fairway drainage, i.e., if the land was flat, it was flat and slow draining.
Also, having seen the original green plans for La Costa, they were not particularly realistic. The biggest thing is they showed the greenside bunkers at the very edge of the green, but I doubt he ever built a green that way.