My bass collection has a T-40, two Foundations, a Sarzo (I have owned two; this one once belonged to Rudy Sarzo - it is one of my most prized possessions!), a Dyna Unity, a Grind, and a Cirrus BXP. I also own a Dingwall ABI-5, Super P (4), and a D-Roc (4).
I used to think like you - that there is "no point" to multiscale on a four. I will still admit that the B is where multiscale really shines and that the biggest appeal of a Dingwall 4 is that it is just almost perfectly conceived and built.
But, I also have an Fender Urge I, and another Urge I was my main bass for a good while. With a 32" scale, I found that I like the sound of the D and the G a little better than a 34" scale. I also don't notice dead spots on the G string (but I know that may just be the specific 32" scale bass that I have). To my ears, there are definite advantages to making that G string a little shorter. On the other hand, if you want to win points with the heavier/metal crowd, making the E string longer might be worthwhile - it accommodates alternate (lower) tunings. Along those lines, I wonder if there is any market for a bass where the 4 is BEAD and the five is ADGCF, or something like that?
One other comment about Peavey basses. How the heck are the necks on old Peaveys so good? Impossibly stable, great fretwork, and so comfortably shaped that it is almost like I helped helped design them to suit me. It is funny to me that the necks are that good and the truss rod access is often so comically bad.