This has probably been suggested before but I think it would be a useful addition to the game at this point to allow a ‘slow down’ option in addition to the 4x ‘speed up’ option in raids.
With the additional mana we have and the length of casting time required for tap heavy spells, it becomes more challenging to combine spell casting and minion deployment with the 3 min limit. By implementing a slow down option, it would help address this problem.
Importantly, this would not provide extra time for a raid, just allow you to cast and deploy more efficiently.