For what it's worth, I totally agree that adding some VG to your juice may be a viable option. In my experience, if it's been steeping for a while, you can add a pretty good deal of extra base without losing so much flavor that you even need to add more. Of course, adding anything extra will technically dilute it but I've had plenty of juices that I doubled in volume and still could taste plenty. Frankly I feel as though a lot of store-bought juices use more flavor than necessary, but it all depends on the juice and individual palate sensitivity.
Anyway, yeah, +1 for adding some more VG to any juice less than 50, maybe even 60% VG. I usually use anywhere from 50/50 up to 15/85 PG/VG in a tank that probably doesn't handle high-VG juices half as well as yours does.