Yes, I can see that too, including the idea that this isn't a 'tease' by the company and that serious decisions have to be made, both by WWE and Daniel himself. For that reason, honestly explaining what's going on with him medically wouldn't be wise....because at this point, they genuinely don't know.
When Daniel came back last time.....apparently, prematurely....it was impossible to know whether the company was pushing him to return....or whether Daniel wanted so badly to get back that he pushed the company.
On one hand, you would hope that protecting their performers would be paramount in their minds.....or if you want to see it cynically, the last thing they need is to have Daniel wind up crippled and having his family going all 'Martha Hart' on them.....when, in fact, Daniel knew fully well the risks of wrestling again.
Daniel hasn't had his surgery yet, has he? If not, then the options are still being considered. If WWE isn't telling us what's wrong with him, it might not be because they don't know, but could be due to life-altering decisions being made that make full disclosure to the fans an 'iffy' proposition at this time.