I actually don't think the Eduard Gustavs are overscale. Everything seems to be sized about right with the wings simply being too long.
Dimensional issues aside (and I personally never would've noticed the oversized wingspan) the kit looks great. I didn't start on mine yet (gonna have to wait for this GB to kick off), but the amount of details Eduard packed into those kits is simply stunning. Especially the surface details look amazing. There's also plenty of options, including the tall tail and Erla canopy.
I know there are modellers who regard the long wings as too much of an issue and I completely understand and respect that, but I only really mind dimensional issues if I notice them without holding a ruler next to my models...