Since when was an S-turn against circuit direction? That would be a U-turn according to my recollection of the alphabet, and since when was a side-slip a component of an unsafe approach? I've flown into many a tight strip where the safest option was slipping in for obstacle clearance.
There appears to be two types of flyer on this forum. Pilots and aeroplane drivers. Eventually some of the latter will become the former. Some never will.