...yes it should. that's the whole point. it is an instant handicap by definition. you're FORCING yourself to use electrics. how is this not an instant handicap?the entire point of bringing up mono electric is that electrics are really good in gen 2 and it shouldn't be an instant handicap to use 6.
name one. mono psychic? countless teams get zero competitive use because they all suck. again, feel free to name a good team that gets zero use solely due to snorlax.there are countless teams which get zero competitive use because he exists.
alakazam becomes no more viable than it is now -- very situational. he's held back offensively as much as he is defensively. he can't switch into shit. offensively you'll still have a hell of a time "sweeping" with dual punches and psychic or some shit, while serving no purpose other than to wall gengar. i guarantee zam still sucks major dick without snorlax and will not be played at all in top tier teams. mr.e the master of the zam feel free to chime in on zam's suckitude.
blissey is one pokemon that'll benefit heavily from a snorlax ban. this is why everything will in most part remain the same. blissey might even vie for an S spot.