Mollywog, I think you'll find that the VG proportion in a mix has no bearing on the performance of the -C atties.
I use about 50/50 VG/PG
and I know that 8Ball uses all VG except for the flavouring (which comes dissolved in PG) so that's up to 90% VG;
and neither of us have had an issue with the -C atties.
If you've been vaping just a short while, you may be finding your flavours weak because it takes a little time for your tastebuds to recover from your old habit. If you still indulge in that "old habit" (I'm treading carefully to stay within forum rules here...) then your tastebuds will remain fairly unresponsive.
Even if you've been vaping for quite a while, there's a possibility that you're having an episode of "Vapers tongue" when your sense of taste is diminished or even
absent for a while. This happens for no apparent reason but usually doesn't last long... it helps to vary your flavours throughout the day instead of vaping all one flavour...it seems that the old buds like to be surprised from time to time
of course, it's also important to stay hydrated... drink plenty of fluids whilst vaping.
Hope this will help