32 BIt Windows is pretty much obsolete and has gone the way of 16 bit Windows. Assume that most major game releases will require 64 bit Windows. It is now the standard.
The whole campaign for selling Numenera was as the successor to PLanescape:Torment. That was the major thrust of all the advertising.
When you basically make that you are the follow up to one of the most beloved RPG's of all time,good is not quite good enough;it needs to be exceptional,or you are going to disappoint people. This is what has happened with Numanera. It is not so much it is a bad RPG,but that is not nearly as good as PT. And the makers of the game set themselves up for this reaction.
I have not played it, so I have no dog in this fight,but it's clear this is what has happened.

I think the real problem is a disconnect between what the devs say and what the fans hear. A 'spiritual successor' seems to be heard by fans as a re-hash of the original. While inXile were pretty clear that Torment was going pull design goals inspired by Planescape, namely:

A Deep, Thematically Satisfying Story
A World Unlike Any Other
A Rich, Personal Narrative
Reactivity, Choice, and Real Consequences

but in a completely new setting.

I think people read that to mean a game in the Planescape setting, with similar (maybe even returning) characters, etc.

Now, it's very likely that some just didn't like Torment anyway, but I really think a lot were assuming they were going to get Planescape 2. But that's not what inXile promised.