Why was the arena changed to one second?

like why ? who out there said they needed a one second deployment ? why why why ??? just how fair is that ? i need to know every detail of it because it just pisses me off to get domed when the trapper just takes a glimpse of me

The dome was changed due to the new balance changes, Monsters now have the firepower even at S1 to dish out high damage and get a down in. The devs also decided that it was best because it would let Hunters get damage in at S1 without having to hold the dome until the S2 evolution.

That is all the reasons I know of, there may be more information in the stream discussing the balance changes [here][1]:
[1]: http://www.twitch.tv/evolvegame/v/9130808