So you want arena games in matchmaking to be played in the new empire Wars mode? In my opinion most people would not be happy with such a fundamental change. The dark age and beginning of feudal age is an integral part of the game and removing it would be too big of a change, even if on arena there is not much happening in the first few minutes.
If you are interested in Empire wars in general you should check out the upcoming 1v1 tournament sponsored by RedBull with a prizepool of 20k€
After this event players and viewers might have a better understanding of the mode and your question could be asked again