That makes sense
presumably it's a configuration setting, so hopefully mod developers who want to put in the time or build a completely different game* can free it
The question, then, becomes how can the user experience be improved to help the limited rotation feel better? It would be interesting to understand how the current 60 degree value was arrived at - it might be possible to tweak it up some without exposing artefacts. I suspect that part of the issue is that 60 degrees or so doesn't feel 'natural'.
* There were some rather wild NWN mods that managed to change the apparent mechanics
