I think you are mostly just suffering from editor's ear. My only comment is that the bass is now a little under powered as far as where I'd mix it. (I'd put it about half way between where the original was and where you mixed version is.) The over quiet bass makes it feel like it has a little bit less of a beat, but overall the mix sounds fine.
If you want it to mostly be in the background, I'd try applying some expansion to the bass so the big hits of it still push through to the top, but it would then drop back down behind the keys, though personally I think it would sound ok just bringing it up a bit overall, maybe with just a hair of expansion.
One other minor thought, it sounds like you may have put some reverb on the keys, but I might back it off a bit on parts of the keys to keep them having a crisp punch. It serves them well on the notes that hang out there, but it cuts the punchiness when the keys are playing more actively.
It's normally to second guess yourself when you are doing your own work though as you know what little parts you wish were a little different, but to an outside observer, it isn't really that noticeable.
If you still have a problem with how it sounds after stepping away for a bit, can you try to describe more of what about it you are trying to fix? That would help direct the feedback a little more.