I do think exclusives benefit us directly and indirectly, although they have some cons. I mean, an exclusive has generally a much better budget and timing. Also, an exclusive development means there are more people interested in certain system, therefore there will be more games for that system. So I wouldn't say "everything should be launched in everything", because that wouldn't be a benefit for gamers.
On the other hand, I wouldn't buy Wii U version since this game is going to appear on PC, which means I can play at full framerate with any resolution and gamepad I want... so I'm sorry for consoles this time.