The old card system, or at least the cards them self should come back, the new cards are just....bleh, I feel like a bot throwing them out, at least I could decide before if I wanted to buff a card or not.
If balance is causing the problem, change it, change it to direct hit rate increase like how spear used to be, if spire's TP effect missing is a problem, make spire a heal pot increase on the target or the target's abilities, if them being UP with these cards is a problem, make the duration of the cards 30 seconds again and give them the old pots.l There ARE other things that can be done, I liked giving a BLM arrow cause it felt like mobile laylines.
The seal system is....alright on paper, but in execution, it's repetitive and just boring.(though, divination itself has a pretty effect!)
Everything on AST feels fine now (in my opinion) but it would be a lot more fun if the old cards were back.