This has most likely already been suggested but I believe that the Character Creation UI need an update.
1. Better UI, as it is the Character UI is extremely simplistic and could use an update, that being said the UI works fine it could look extremely better with a new look.
2. Add rotation while looking at your character in the customisation screen, I believe adding rotation would make it 10x easier for players to see features like their nose and chin easier with a rotation option along with looking at their characters side profile in general.
3. More hairstyles need to be added as they are already in gta files and im 80% sure there is already mods/scripts that could be implemented for this (applies for barber shops also).
(also one thing that has not got to do with the customisation is more clothes would be a nice add also)
Please leave any feedback.