The Builder on my new build just left a big hole on the lower tiles, I asked him to resolve the issue - so he did, he just stuffed a bit of material in it, is this acceptable - looks scruffy to me

Is that lead or felt?

A bodge.  The lead is a mess, as is the pointing and the fascia has only been primed, the end has not been painted nor the screw holes filled.

IMO that’s crap.

1 hour ago, Faz said:

Is that lead or felt?

It looks like lead

 

Is a poor finish, looks like some self adhesive type ‘lead’ alternative

likewise with the fascia board, poor finish 

Lead will be fine for that detail - it would be better if it was done tidily though.  I am assuming this is a work in progress - if it was handed over with the facia in that state then you would be questioning the workmanship on the entire job!