I agree that +2 shots of a fruit flavor plus VG is going to make things sweeter than you might intend, but thought I'd give some feedback from someone who generally goes as close to 100% VG as possible. I find that PG dries me out badly, even when I am drinking a lot of water when vaping. I don't think I am allergic to PG, I just don't like a lot of it in my juice. I also don't like a lot of throat hit, another reason I avoid PG. VG doesn't dry me out nearly as much, and is smoother on my throat. I also like the sweetness VG imparts on almost any flavor.
I find I usually add a couple of extra flavor "drops" if possible when I order as I find the VG mutes the flavor a bit and the extra shots correct for that.
All that being said, I also don't tend to like fruit flavors, so maybe that is why it all works for me!