Some new talents that do anything really would be great, because right now rebels have a set of 29 talents they learn, bounty hunters have 29 talents and it's pretty much common knowledge what talents you need to get maximal gain. Maybe more talents that provide discounts/vehicle skins. When the server is at tier 3, having 35 talents, I generally end up with a bunch of spare ones.
Excess infamy -
Adding a new infamy tree would be beneficial, since the current 2 are kinda generic and don't really add anything to gameplay, they're just bonuses. A good idea I saw is here
An infamy talent allowing rebels to gear up (in a similar way to how cops can) would be a good idea for a new addition.
Maybe add things like Armour stacking, vests/speed bombs as infamy things (or to honor for bounty hunters) - since right now they use up civilian talent points and they're more of a rebel-centered thing.
Infamy needs to be buffed - it takes a long time to gain and the only efficient way of gaining it is running meth, selling gold bars or chopping vehicles. Even then, the amount you gain is relatively small in comparison to the speed you can advance through the honor talents in bounty hunter. Maybe add an infamy bonus for killing cops (or even killing in general) and some other ways to gain.
Infamy for crafting at black market if this isn't already a thing
An infamy talent that allows you to evade governor taxes might also be a good idea??