I'm the one who beds deeply and banks the walls...
Bedded deeply the stall when used for a potty drains away and captures the urine and supports the manure so it isn't walked in as easily to the rest of the bedding. The stall top stayed dry as the wet had a place to go to and be absorbed.
I used a regular sized wheelbarrow and could fit easily 2 stalls cleaned in a wheelbarrow...only thing that went out was urine soaked shavings and manure but no extra...we didn't
scoop and dump, we did
scoop, sift and then dumped.
Done carefully it works, done not carefully it is a terrible waste.
Lastly I would bend and pick up any left over pieces on my way out...it is only wet hay, just processed.
Banking the walls actually keeps the horse from getting as close to the wall, when you bank out about 2' from the wall base, the horse has less tendency to lay down and roll that close to start with.
When my horses were to lie down and roll they actually went down in the middle and were able to go completely over either direction with no problem. Remember, I had large
boxes not smaller stalls as some have.
I found the bedding being made much thicker in the middle puts their body on a slant to the outer edge of the stall possibly making it harder to come back over after a good roll...think of a body roll under your back
, kind of holds you and makes you stay put once you turn over...
... Hey, you can only do as you are told by your boss... everyone has "their" way of doing things...as long as it works regardless of what the procedure...go for it.