Good article, I totally agree. I only shoot at a bullseye target for the first couple shoots of the season just to make sure that my bow is dialed in. After that it's 3d the rest of the season for this exact reason.
I shoot at my Block at the various black circles. I also print out a self-made black oval on print from my PC and that symbolizes the lungs of a deer and I aim at that. It all comes down to accuracy and mechanics whether it's 3D or 2D.