Another suggestion: Having the ability to have the FIB and IAA buildings available to walk into. Those that enjoy playing as IAA, DOA, and FIB should find this a more realistic feature. In the offices, you could have features to interrogate suspects, it could be another option as a jail, and it would add more to the realism as in reality, the FBI, CIA, and DEA always have agents inside of their offices doing office work etc.