Best discussion ever, still we need to get rid of this bslam on snorlax. Like gbwead said, that huge paralyze chance is not in your hands, you can´t do anything to stop it (No, lum berries are not worth most of the cases)
Winning/losing by some factor that you can´t control is highly unhealthy. OHKO moves like fissure or sheer cold have literally the same chance of body slam paralyze and they are banned for a good reason. Despite bslam´s paralyze not being a decisive factor like those moves, it still is a huge problem in a pokemon with so many switches in like lax.
Without bslam snorlax is much less rng dependant. And even there, lax has the stats to be a worthy pokemon for the meta, however without the pressure(too huge) on paralyze chance, the opponent has choices for checking and countering it like any other mon.
So, unless u are willing to go 252 hp/def ampharos to not get paralyze, a complex ban on lax would be the best.