the hard part about jail builds is making it an environment that both cops and prisoners have a fair advantage in.
don't make a hundred different hiding places for prisoners, each one with two or more guns, and in places that cops can't get into. don't give the cops over powered weapons, but give them stations to heal at (and maybe don't let prisoners use that, instead make them use pills).
don't have too many torture chambers, don't have large doors that take a minute to open as someone escapes, don't have a lot of cover outside, don't make it impossible to tell when someone has escaped, heck maybe even make the whole jail on an island and you have to escape on a boat.
i don't even play many jail rp's and could already give you a list of several things that would improve the build. i just don't have the building skill lol