I want the ability to remap controls as well. I'm having a hard time adjusting to what's in the beta. If I can customize the controller 100% I'll be far more effective in the final release. Even if they (Ubisoft) confirms customizing the controller in the final release I'd be happy. And I don't mean just swapping buttons but actual remapping to any play style.
To answer your question no you can't from what I've seen. I noticed some swaps with the analog but that's it.