Great game. A lot of potential.
You should implement multiple equips, divided into 3 different categories - weapon, armor, and accessory. Then just do some simple recoloring of items for different tiers, and a static upgrade instead of ratio based for the items. So start with iron, then steel, then.. well just pick a thing. Would add more depth grinding for items for each character.
I like it. Maybe decrease wait times, and give some more incentives for me to play daily. Having boon's for 4/7 days of the week kind of sucks. Also 4 hours to complete a mission is a bit ridiculous. I understand that it creates that incentive to buy the gold in the game, but I'd be more willing to buy the gold in the game if I felt it wasn't necessary to quickly progress, and use the gold on items and what not. Just my 2 cents.