Definitely no thinning shears! I live in Asia and wavy/curly hair isn't as common so at this one place they cut my hair as if it were straight w/ thinning shears. It was horrible! This was 7 months ago and it still looks bad.
The short layers were WAY short bc of the spring (duh!) like up to my eyes and wouldn't clump and I had like this weird singular wave by my eyes that looked like a ram. It also somehow took the wave out of my underlayers as well, so maybe no heavy debulking for you?