I know it sounds stupid but what if they had a mode where at the start of a new game you get the choice to choose between normal game or RP mode? i.e Pick a nord -> Warrior or spellsword or magician ->a certain amount of preset perk trees are available everything else grayed out,even during the game,if a magician adds a common weapon to their inventory they are penalised by losing a perk and 25% of all three stats are deducted until you drop the weapon.
Basically what oblivion had with character sets.
I know alot RP out there but the game has a zero to nil penalty system.
I hope no ones thought of this before and started a thread elsewhere.