Skills are supposed to be an optional module. Stealth and Perception are both core to the game, so perhaps it would be best if we excluded them entirely from the skill module.
If people just want to use ability scores for Stealth and Perception, that is the non skill module. If they want to house rule Stealth and Perception out of the skill module, no problem. Removing Perception and Stealth skills from the skill module? No, thank you.