Um, actually I hope they don't put the retreat in... if you lose, you lose. One time I really needed to win some arena points, and I was just about to bean an Azure Fang when she - I guess - closed her window and I didn't get anything. I hope this doesn't sound whiny but I think it's cowardly to do that.

Ya don't have to use use it if ya don't don't want to

But I can't control what other people do, and their decisions impact me.

Pretty sure if you're using the client you can just refresh the client itself and it retreats you from the battle, giving your opponent the victory. I've had people bail the instant they see I have Iruka, or rather they just fought me 5 minutes ago. I prefer this obviously as the pace of arena gets really dull when farming for Sage

"Change Arena" - How ?
"add a Retreat function to it" - How is it going to change activity in your server ? Or better question, how is it going to motivate players to join/fight in arena more ?

If you want to suggest something, you need to explain what is your suggestion. How and why would you like to see some changes.

add easy to beat bots to motvate people to play and bigger rewards past six paths i hate getting the same high lv guy evertime cause no ones in arena sux when u get him over and over after a 19 min wait everytime