Even if it were supposedly de jure nonpartisan, I fail to see how it could be guaranteed to be that way de facto. So I have no particular impulse for or against the idea. More generally tho, should any election in a FPTP system be explicitly partisan? Why do we need parties as gatekeepers?
The tribal nature of party affiliation allows people who are unable/unwilling to research individual candidates to participate in politics with a modicum of intelligence. Otherwise a lot more voting would come down to "I've seen her name a lot/she sounds like a filthy Polack/etc."