Can someone take a good look at the new UI's and find a single instance of a new bit that's an improvement on the old UI ? Seriously ?
There are a few, I think.
Outfitting: stored modules actually have some categorisation on them rather than being a 120-item list ordered by price (which might mean they can let us have more of them). Easier to get a very broad overview of what the station stocks. Can see modules for sale you can't currently fit but might want later.
System map: while removing the hoverbox takes away access to a bunch of useful quick functions, it does also mean that it's not permanently in the way right up until you try to click on it when it turns out it's then decided you meant the other planet. That thing never worked properly. The side panel method is actually pretty good for most things and gives more space for the map when you don't need it, as well as giving quick access to some useful information it was slow to get out of the previous one. (Problem is, getting the side panels to show the info you want is too slow)
Missions: being able to independently filter either by faction or type or both is really useful. The new cargo depot interface has proper acceleration for transfer (which is a poor second to it actually defaulting to "transfer max possible", of course!)
Station: the new local news interface is better (except when dealing with hugely multi-system factions, but the reason for that is mostly not an interface one), the advanced maintenance page is better grouped, the authority contact still needs work but maybe it'll stop people thinking their bounty is a fine because those two are now clearly separated.
I could come up with much longer lists of what's wrong with the new UIs, of course - the bookmarking and route plotting interface is a mess, the list of surface bases is sorted neither alphabetically nor by location, lots of things which should do something useful when clicked on don't, the system map factions page only shows one state per faction, several common tasks have increased the number of clicks needed to do them, etc. etc. but they've all already been said.
But equally, it's not as if some of the things they were replacing were great either: the old outfitting interface was also pretty clunky and regularly complained about (and widely disliked at the time when it replaced the Even Older Outfitting Interface)
Overall, while I prefer the old interfaces (which is partly just five years of having got used to them) I think the new interfaces have more
potential to be good interfaces
if they fix a bunch of the issues. Unfortunately, at the moment, it's a new rough design versus a long-refined (but limited) design. Definitely needed more polishing and user trials before release ... this sort of thing, one interface at a time, could have gone really well with the post-Beyond patches.