People want to conquer the ENTIRE race not just some wizard. I want to fight it out to the last burning city of mine or theirs.
You(Ya) and some others want but not everybody agrees. The effects of conquering the civilization by killing the wizard or by conquering all the cities are the same: You destroy them from the game as opponents. The only difference is that killing the channeler, his civilization is still there and what to do with it must be decided, which could end with them joining other forces, being indendant force,... In any case, just avoid killing the enemy channeler while you destroy his cities.
And if Stardock uses this system of "death = game over", they wouldn't be stupid.
Like they weren't stupid for not having multiplayer for Gal Civ II.
I'd vote for a toggle in skirmish so people can play it as they want but not for campaign. In the campaign you die you lose (would make sense based on the story after all). But for skirmish if should be an option like may other ideas that are being considered.
Then we can talk, as it has been already talked, about ways a channeler has to prevent his demise. And how he deserves to lose the game if he didn't take the measures to prevent death and/or he was a fool doing foolish things (we are going to suppose that it's not possible to have a random death by weaker creatures or something, that would be cheap).