I think removing the comp command could be a great start to improving roleplay, as right now it's just hope the other person engages first so you can blast their head off. With the removal of the command, it'll enforce staff to actually verify the outcome of the situation, instead of just a blanket "yeah i'll comp and return you" as 99.9% of RDM tickets are people just wanting their gun back.
With this change, players will be more careful with drawing a firearm, as there's actual consequence to losing it if you die, compared to just "oh ill make a ticket!". This will increase melee weapon usage, and make RDM baiting (a real problem for some moderators to figure out somehow) much harder.