"Hes not really all that much more powerful than the other Death Gods but this ability does wonders."
Even without that ability he's still very powerful, he beat Toshiro in his Bankai like he was nothing, simply used a Kido to effortlessy beat...the Fox one I forgot his name and then beat up Ichigo in Bankai like it was nothing, though granted he was tired.
True but if it was a pure kido/power strugle, the old guy would have won hands down(I am talking him pre-Arrancar/Espada form). It was that one unique little power that set him worlds apart. Tousen was his only rival in that department....cuz he's blind, probably the main reason Aizen needed to bring him over to his side(although he under estimated Tousen's sense of justice). Brilliant planning on the writer's part.
Oh, here is another good one...