Don't measure anything else cause if the frets don't buzz - it's pretty ok to play.
4,5mm... that's alot. Too much for me - could not play after 3:rd or 4:th fret with that height. The E and A bass strings need some room of course but I wish I could take the string down to about 2mm on the 12:th but then I would probably have to change the 105-50 set to 95-45 - or would it make any difference? DB?