Iím not sure what their spell list looks like so I canít say if Every Spell is a Ritual is broken or not. Unlimited Wishes? Imprisonments?

I can say, without question, no further casting while concentrating is bad design unless their concentration spells universally provide some new kind of action, like Witchbolt or Enervation do ( also note, everyone agrees those spells are terrible, essentially spending a spell slot for a new kind of Cantrip thatís easy for a foe to end).

Good luck whatever you decide!