Why would the PC be better suited for Diablo?
The first Diablo got a pretty good port on the PlayStation 1, and the PS2 and original Xbox got quite a few great Diablo clones, including the previously mentioned Baldur's Gate: Dark Alliance titles.
The previous Diablo games were not heavy on keyboard shortcuts, and thus the necessary commands would fit on any post-NES gamepad, and while they used point and click I'd say that design decision was not to it's credit - since Diablo is a solo-RPG, using point and click instead of direct control only added an unnecessary layer between the player and the main character of the game that would only be needed in a party based RPG like Baldur's Gate, Dragon Age and such.
Those of you mentioning the Dragon Age console port as a reason Diablo wouldn't work - they have the exact opposite problems, as party control is a necessity in a game like DA:O - which is arguably best handled with a mouse.