Isn't it time for a second spell factory
Really it seems ridiculous that up at th10 (im only th9) they have 5 spells to train that take a minimum of 2h30mins. Supercell may think they make money because it promotes boosting but at th10 training a full army for champions attacks is limited to the time it takes for a spell factory boost. If you can get spells quicker i can see more full boosts happening as people will then boost barracks and heroes as well.
TL;DR - Need a second spell factory at th9 or 10. Ease of life for us, more gem spending potential and money for supercell. Win Win