It's definitely a bit of a quandary when it comes to WWE's stance on Chyna.
First of all, it's a shame that this has happened and that she met her end this way; it's a shame that anybody comes to this sort of end. From what I understand, as of right now, it's being investigated as a possible overdose though I haven't read anything regarding whether it's accidental or intentional.
Some of what I'm about to say sounds heartless, it's not really intended to be, but I don't think endless praise needs to be heaped upon her or her life should be sugar coated just because she met an untimely end. For me, Chyna was never remotely a great female wrestler but, rather, she was a female who had a very unique look during a very unique time in pro wrestling. She was intimidating all around before she started with the breast implants, having her jaw worked on to look more feminine, etc. though she did keep herself relevant in WWE for quite a long while by reinventing herself from being this badass female enforcer to something more akin to the traditional sex pot Diva. I can't say that I ever really found her to be all that entertaining, she just happened to be surrounded by a lot of entertaining people like HBK, Triple H, the New Age Outlaws, Chris Jericho and Eddie Guerrero. While I was never a huge fan, I'd be a fool to try to deny she had a major impact and was a memorable part of the Attitude Era.
Chyna's problems, based on what we know about her, are more self-induced than anything else. Chyna has been significantly involved in drug use for a very long time and her drug abuse is part of the reason why her personal life became such fodder for the tabloids. Chyna winding up doing porn didn't surprise me in the least because it's par for the course for most women getting into porn to have a destructive life before porn or develop one while they're doing porn.
As to what WWE "owes" her, I've never really been against inducting her into the Hall of Fame but I just never really thought it'd happen because of her porn career. I can also see why WWE would be reluctant to induct her for personal reasons that have nothing to do with business. In February of last year, Chyna came out and claimed that Triple H physically assaulted her during their relationship, she even talked about it during a series of interviews with Vince Russo on his podcast. She eventually apologized for making the accusations and said that they weren't true, but the fact that she even went there was pretty despicable. Triple H has his share of enemies and haters just like any other major star in pro wrestling, but there's no possible justification for making such untrue claims. I remember that people were talking about the accusations for weeks, but that the talk suddenly died down when she admitted that the accusations weren't true; whenever a woman makes accusations like that, even if they turn out to be completely false, it's the accusation that people care more about and hardly acknowledge or remember the vindication of the person accused.
I am genuinely sorry that her life turned out this way and that she met such a tragic end but, as I alluded to, I don't think we should automatically be trying to elevate her to sainthood or fully declaring what WWE "owes" her just because she's dead.