I would like to propose an 8/12 hour timer freeze function for the Arena/Coliseum that can be activated once per day.
During this period, the timer will simply be frozen and not count up/down (your ranking can still change). During this period, you will not be able to make any attacks in the Arena/Coliseum as well. The effect will last for the whole duration and cannot be deactivated manually.
Reason for this is to allow us to sleep in peace. It is very frustrating to know you are in the top 5 with 3 hours left before promotion only to wake up the next day and realise there was a merge during your 1st hour of sleep and you are now 11 hours away and still counting down.
It is still acceptable if someone kick me off the top 5. But to lose your progress due to a merger is simply ridiculous.