I agree. The match was meh (not fantastic). I don't think Shawn was "phoning it in" per se, I think he trying, he just was too limited. Being a big HBK fan, I can't even really watch the WM 14 match anymore. It's painful to watch considering Shawn's obvious pain and also the prior Shawn vs Austin at KOTR 97 which was a taste of what they could have done together.
There was an Austin VHS that had a stylized highlight version of Austin vs HBK WM 14, and I find that version the only watchable version of that WM 14 match. It's here: https://www.dailymotion.com/video/x8giv4q
The only positive I can offer is that this is perhaps their best match together. They had significantly worse bouts against each other. Gimmicks had to be employed over the years to try to make their matches better and I don't think it really worked.