Few ideas in the realm of Bodyguards here. Slightly undecided as I write these down, I'm just jotting them as they come to me. 

BG wacking options. I think it would be very interesting to see a slightly changed BG wacking system where you can possibly take more than one shot at a living individual's BGs at a time. The gap between shooting would still be an hour, but you are given a set of choices once you have shot at a Bodyguard. You would have to select from "1) Shoot at a different BG?" at a much higher risk of being caught (ie. thrown in jail, lost gun or one of your BGs wounded. Not death, or BG death in this case); "2) Flee from the scene" having shot at a bodyguard, with a very low risk of being caught and thrown in jail.

One small idea would be that Bodyguards are less effective, therefore could cost less. This would make them more readily available to newer players, and hence could make the game more interesting for them. As much as it may be my idea, I can't say that I like it too much as it would flood the game with BGs.

An improved idea on the 2nd would be to have different levels of Bodyguards, which would create an interesting tier system where you can buy cheaper BGs for a lesser amount of defence or a more expensive BG for a higher amount of defence. The crucial thing here would be that you must get less defence at a higher cost for two cheaper BGs than you would for one more expensive BG.