Looks very good i would say. I think cutting the fabric at 45° would make things worse as it is going ot move around more but you still need to get in the corners just right. I assume you are using a spray tack to hold the fabrics in place? I think it is just a learning process. start in the center and work your way out. make some dabbers to push the fabric into tight corners. Once the fabric is tightly pressed against the mould the pinholes will drastically improve as well.

If it doesn't work out i would cut the fabric along the tight radius and then have another patch overlapping by 10mm or so. as there will be a highlight on the tight radius in most circumstances this is hardly visible.

cheers, Lester