1. It's a bad idea giving wizard items like staff of slipping or belt of wands since if your doing a stealth mission it'll be a dead get away and if your in a group and one gets caught, sec will search everyone's stuff and see there things like the belt of wands or or staff of slipping making it impossible to get your goal done without to much chaos plus it might lead to power gamers being utterly focused on them to get there magic items.
2. even if you tone down the power, sec will immediately get lethal and the more RP objectives like you suggested will be impossible like" You have decided to become the ruler of [insert nation name of a random department], declare independence and revolt!" would either not go with it and rat or if it was like revolution specifically for that department, it would just be an arms race and end with a everyone killing each other and a call the shuttle, if you get "The winds of chaos have chosen [Insert random player here] ensure their shift is as turbulent as possible!" that'll just end up as a murder bone as that isn't specific enough to say what's allowed or it'll cause sec to think its a normal wiz round and immediately go lethal.
3. if you let them randomly give them a kit it'll might be bad for the objective you get, lets say you get Elementalist your sorta stuck with a completely offensive loadout are forced to go loud, or if you get the honkmage you wont have any direct ways to damage people which will lead to a sec dog pile but if you let them pick the kit, it'll lead to power gamers to pick the meta kit making it rather annoying to see the same kit over and over again or it'll lead to the same gimmick over and over again.
I don't hate this idea but this would be better if stealth goals were involved and were given a less powerful but varied choices, since a lot of these goals seem to require roleplay and if you wanted this to automated into the system without admin intervention, this would lead to defaulting to murder bone or just sec not trying to deal with the roleplay in the round.