((apologies if this has been discussed already, i didnt see anything))
the wishlist system needs a major overhaul.
if you have more than a certain # of items in the one category, you are unable to organise it and move items to different categories. i spent literally an hour or so sorting my uncatergorised items only to click the process button and have nothing go anywhere. maybe its just me? the text-only view also fails to correctly sort items
the text-only view is handy as it lags the page less, but it does also make sorting harder. i dont know which items are CW without resorting to searching the shops in another tab and etc
in text-view the category names dont scroll with the page so i keep having to go all the way back up to check im putting things where they need to be
there is no quick way of sorting items in normal view like text-only. im getting carpal tunnel here guys :(
another neat addition would be the option for a pop up when adding items, a list of your categories so you can organise things even more easily

No to the pop-up. That's been suggested before and I still don't really like it.
I would love to have it fixed so that you can sort large categories without having to go top-down, but in my experience your category would have to be super, super long for it to be a problem. I've added pages and pages of minions from Subetalodge to my WL and never had a problem getting them to sort.
Other than that I don't really think there's a problem with the current sorting.
I think the wishlist page needs overhauling. Maybe it's due to all the pictures loading, maybe it's due to how it's coded, but it always takes me at least twice as long to load those pages. I'd absolutely love a text-only mode.