I have found that less is more. Every year I do less with seemingly better results. Last year I spoke to one coach who told me how little his elite guys do even 8 weeks before NCAAs. My guy was battling injury and we were forced to do similar to what you and he did and I was shocked it ended in a big PB. This seems to be more common than you would think…makes sense when you think of all the guys who do great shortly after an injury where they are forced to rest.
That being said, it always fascinates me that some people do well off training like this and some will do 5x that volume with good results.