Hey D11_Nat! I have suggestions I believe could help you guys improve Prison Architect! I won't go into a lot of detail and I will get straight to the point with these awesome ideas! If worse I won't take any credit for the ideas.
-Custom music for the radio so players can listen to their favorite songs!
-Basket ball court as a optional thing for the yard! Also could be a mini game for Escape Mode players!
-Yes! Mini games for stuff like the basket ball court, the pool table, weight lifting and reading books to gain points in Escape Mode!
-Money to buy stuff from the shop to gain a temporary boost and spend money to get other prisoners or guards to do your dirty work in Escape Mode.
- Be able to join a gang in Escape mode, do mini missions in exchange of money or points and have a new available trait called Respect which gives a 30% chance to get away with illegal activities!
-Only legendary prisoners who're in a gang could have a 5% chance to pull off unique crimes like: Wear another risk outfit to get closer to a specific target and kill him. Another he could obtain a guard uniform to get access in staff only areas and steal a gun. Another he could plant a small fire bomb in a enemy gang cell while disconnecting any cameras in the area and get away with it if the bomb wasn't detected by guards first!
-Two player co op or split screen in Escape mode along with mini missions (using a phone to activate it) to either steal (steal and stash a random item in a random location), murder (kill a specific target) and snitch (talk to one prisoner for info and then talk to another whos wearing a different risk outfit while avoiding the first guy and other snitches during the encounter or else everyone will know you're a snitch)
-In escape mode the character should start off as the lowest risk available at the current prison and be able to decrease or increase in risk depending on his behavior to make the gameplay more of a challenge to avoid death row!
-If a high risk or death row prisoner obtained a gun and has the fearless trait, he could hold one of the guards hostage for only a small amount of time while making his way to the closest exit before knocking the guard out and leg it!
I understand if you can't consider any of my suggestions. There's only so much anyone can do to a game. I play Prison Architect everyday and I'll look forward to more fantastic updates! You probably don't get positive feed back very often so let me be the one to say Good Job Friend! 
