About the ban system suggestion, Zeox already made a change and increased the amount of gold coins you need to pay to unban/unmute your account.
[spoiler=Cost of unban & unmute]
Service: before -> now.
Unban: 15 -> 30 gold coins per day.
Unmute: 50 -> 100 gold coins.
Also, about the question for the new arena season I have already talked with Zeox about it and he said that arena season 6 will begin after the upcoming update which is planned in this week if I am not mistaken or couple weeks after the update.