I think all Dominion players would agree that the "AKF detection timer" is too short, unfortunately we aren't Riot's target audience. Now before all of you get mad, you have to realize Riot is a business and the number one most played game in the world. They cater to the majority. Sadly, Dominion isn't the majority. While I think it's a very good addition to SR, it just doesn't work as well for Dominion. We are looking at 30 seconds queues vs 1 hour queues. While it was a great idea for the other modes, it just doesn't work as well for Dominion since the player base isn't as large.
Now that that's out of the way, I do agree it could be a BIT longer without affecting the SR players too much. 10 seconds is a bit short in all honesty. While I see where Riot is coming from, I think they could more easily cater to both modes by extending the timer 5 or 10 seconds. It allows us Dominion players a bit of extra time in case we have to step away for a quick moment during our long queues, and really doesn't hinder the SR community much.
A lot of Dominion players quickly jump the gun to hate on Riot, but you really have to understand they are just doing what the majority wants. It doesn't mean they hate us, it doesn't mean they don't support Dominion, it means they are a business, and any successful business will listen to what the majority of their customer's want, unfortunately, their majority is SR.