Wow. This is such a wonderful list of suggestions. Thank you so much for taking the time to play and list out your feedback and suggestions! There's so much good stuff in here and I find myself agreeing with you on several things like the items feeling underwhelming/too many, defensive spells not being good enough (this is a sharp observation!) and behaviour switch is a great suggestion, and consumables is a great suggestion! I'm planning to add that next.
I'm about to push a new update to the game that may address some of the feedback (especially defensive spells being weak) but I'll defnitely be considering your suggestions and implement them in the next version of the game. Thanks so much again t-bowd! This is awesome.