1 Hour to refill one Sand is a bad idea
What makes the devs believe that bringing the time to refill 1 sand to 1 hour from the previous 30 minutes will make the game more engaging? It is a bad idea! You riduce the Number of games a player can have in a day, so definitevely is less engaging.
I believe they did it to make us use the sand refill. But whats the purpose of spending ironite to refill if the maximum weekly prize in ironite is 150 (if you manage to get there)? You can use it a few times but not much.
In my opinion it is a bad idea, extending the Number of plays makes the arena engaging, reducing it is not.
I hope they come back to 30 minutes for 1 sand.