So have been playing this for a few days, it starts really painfully slow and rebirth almost feels punishing due to you getting only a meager improvement.
so this games progress is dictated by the drop rate the enemies have and while i can understand cards having such a low droprate, for most other things like materials it seems to be a bit weird. elemental fragements are the core of your magic, but getting enough to make basic scrolls takes at least 5 minutes of farming.
in general I feel the core mechanics are fine and fun to explore, but the droperates need some revision, in many cases I would double the rates and/or give a skill/achievement that could boost drop rate of certain enemy type ( beast, formeless , construct)
looking forward to the full release