which temperatures did you target when printing with PLA on PVA support?
We actually have very good results using those two filaments together!
We use T-PVA and PLA filament from corix3D on a helloBEEprusa dual-extruder.
Running on a heatbed with 3M blue tape @50°C and filament temperatures both @210°C
works pretty well for us.
I hope this will help you in some way…
Cheers Daniel // IT4Race GmbH