The mod itself doesn't give any advantages as far as I can see, but the problem is the abuses it comes with. I've used a similar one that only gave first person view in vehicles, however there were many abuses that came with it which is why it wouldn't be allowed.
Edit: By abuses I mean the range and accuracy your weapons will have and other features.
Peter Hayes- SAPD Lieutenant - SWAT Commander
Peter Hayes - London Captain
Vincent Drucci - T1 Head Caporegime- Stracci
Peter Hayes - T1 SAPD Sergeant
Peter Paterno - T0 Paterno Boss
Peter Hayes- T0 San News CEO
Adriano Decapre - T1 Stracci Consigliere
Ambrosio Capetta- T1 Capetta Captain
Adriano Decapre - T1 Paterno Caporegime
Logan Redfield - Ex Helper