Just because you like to use all or other magic schools doesn't mean everyone else does or even has to. If you can't understand that you have no right to say anything.
I've been focusing on Destruction, Alteration, Restoration and Enchanting so far. I see no reason this should not be viable and why I should have to pick up conjuration because the Destruction spells are lacking. Yea, Impact is great but it won't solve the damage problems.
I'll go right ahead and ignore anyone that replies with a "learn to play mage" or "you're doing it wrong, go conjuration" post. If you want to be a summoner great, I don't and Destruction should be enough with my other skills.