The friction shifter does need to move 180 degrees between the lowest and highest cassette sprocket, which is more than was needed for 9 speed, so you do have to move the lever more.
I'm using a Dia-Compe Silver friction shifter.
http://www.diacompe.com.tw/product/silv ... ift-lever/

I'm using the Shimano MTB 10 speed RD-M781 SGS (No clutch)
https://bike.shimano.com/en-EU/product/ ... 81-GS.html

viewtopic.php?t=148338