He’s had a few, but most of his work from the mid1980s has been crap.
I stopped reading his stuff years ago when it seemed like he’d get a good story going, lose interest in it, and use aliens to finish it off.
I’ve always thought his writing deteriorated when he began to use a word processor. That would probably have been around the early to mid 1980s, so it’s pretty much as you stated. Have you ever considered this?