re:Scotland yard cops lose mobility
I think that's part of what makes it good. If the cops don't have limited tickets, then there is no purpose in having tickets to begin with. It would also make it a lot harder for Mr. X because there are fewer constraints on Cop movement. Additionally, the strategy for the cops is to create a net to continually constrain Mr. X's movement, and not to go all in and catch him in a rush. If there were infinite tickets then you'll see more degenerate state games where players use an all or nothing strategy. Right now, due to the scarcity of tickets (especially metros), the cops are less likely to go all in, because of how obvious it is that they will then be stuck if Mr. X escapes the rush. With infinite tickets, players will go all in, fail to catch Mr. X (or catch him immediately based upon luck), and then be frustrated that they then have to run around for the rest of the game chasing him without catching him. Right now, you get 1 or maybe 2 rushes at Mr. X, the outcome of which decides the game.