by addons i just mean tools for said class to use for example the handcuffs were a great addon to the cp and for the classes that can kidnap.
imo simple stuff makes the class more fun to use and by adding more things the class can use players could be tempted to try everything on that class if that makes sense.
also the restraints message should be added, i think it would give the cops more of a duty or even just players in general. Say you get kidnapped you usually are gagged so you cant call for help. Maybe adding in some kind of bartering system say 1k to get your friend back? i dont know.
Maybe adding in m9k weapons you become proficient in using like in some ttt servers for example making you reload alittle bit faster or slower fire rate but abit more damage. again just throwing around ideas