I Wish It Was Easier to Manage Custom Folder's for Better Organization
I will admit, previously it was in my opinion easier to manage folders and organize your email so everything's not clustered into one generic section. I imagine anyone else with a scrupulous tendency would agree folder organization could definitely be made more fluent and up front rather than feeling so out of the way, it almost feels marginalized at this point.
There's also a problem when you're modifying your folders whilst being logged into multiple accounts, it doesn't indicate which account you're making the change(s) for and even after the change(s) are inserted you're not always sure whether they were implemented or not and for the right account; In short, it's confusing!