My first warmoth neck was satin and I felt the same as you. I was playing a fender guitar with polyurethane satin finish neck at that time and I thought the warmoth satin finish neck would be similar, but no.
Also, the edges weren't rounded as fender necks, and frets weren't leveled, and I've been uncomfortable with it for a while. Once I got some money, I ordered a new, this time unfinished, so I could ask a local luthier to round the edges, level the frets properly, and apply the same finish I was expecting on my first neck.
I love warmoth bodies, but for necks, I think it's better ordering them unfinished.