So, you are in your spell book trying to set up your deck. You can sort by school. That's awesome. But I would like to see a hide button on the cards that you never use. Storm for instance. At a certain point (or ever really) you stop using the +10% accuracy spell. I don't want to see it ever again and so i hit a hide button. And you can have a section that have your hidden spells in it. Just in case one day you would like to use it again. Would help a lot when making a spell deck.
To an EXTENT, I agree, however, (Coming from a computer coder myself) this is a LOT of work for something that would just make a few people happy rather than be a noteworthy quality of life update. Long story short, it'll PROBABLY never happen. I just don't see them doing this rather than spend their time on other, more important matters. With that being said, I totally understand where you're coming from, hence why I and so many others make YouTube Videos on the topic of "Wizard101 Spells I Never Use" and such.