a slipping turn is not considered a steep turn. It is a voluntary uncoordinated turn.
I like that description. Many years ago, at the request of one of the members who has been participating in this discussion (and at the cost of a little tire rubber) I did demonstrate a final approach and landing in my 150 with full rudder applied all the way until the first mainwheel contacted, then straighten out. It was unusual, but not worrisome. As I did flare for the landing, I did approach the stall in this configuration without loosing control of the plane.
because there is no room to recover. You should be careful to avoid a stall at all costs.
Bear in mind that if you're controlling a slip, it is instantly recoverable, that's why I like it for drag modulation for precise approach path control. Flaps, once extended cannot be safely and effectively moderated for approach path control, a slip can.
Stalling while slipped is less good, but recoverable. While flight testing a modified Cessna Grand Caravan last year, I was required to demonstrate stalls to the break with 75% power, 30 bank each way, and slipping to one ball out (which I found is about full pedal). There was a wing drop at the point of the stall, but it was manageable in recovery. Yes, I used more altitude to recover than a coordinated stall would have taken, but not a lot more, it was not a spin.
It is wise to practice this up high, and you'll get more comfortable. Prior to wing flaps being common on GA planes, the slip was a primary technique for approach path control, no reason to give it up! I would agree that there are airplane types which would bite more if handled this way, which is why familiarization on new types you're going to fly is always a good idea...