Recently, valve has released update to their steam library's UI. It was announced long time ago, yet many people (including myself) feel like its unnecessary change that only made things worse.
Since there are plenty of people who dont use gog exclusively, but also buy games on Gaben's shop - what s your opinions regarding this update?

Personally, I felt so upset that it made me happy regarding my recent purchases happening only on drm free stores (since there you arent forced to deal with questionable decisions of creators of launchers). Simply coz:
- New UI looks like it has been made with touchscreens/gamepads in mind. It makes no sense, since steam already has "big picture" mode, but there is no other explanation to these giant buttons everywhere.
- Its visually bloated. Pieces of usefull information has been spread across giant shiny bubbles of completely pointless garbage, like if you visited some modern site without adblock. Remember all these complaints regarding new design of gog's storefront? Well, now steam library looks even worse.
- Its unoptimised. Old library has loaded instantly - new takes up to 15 seconds, coz it tries to update all this additional info displayed on your shelf. Old steam (when not using its built-in browser, but just sitting in library) used medium amount of resources - new eats about 700MB ram (again, while just sitting in library). 700MB of ram for a launcher designed to always sit in your tray - thats... quite a lot. I remember when pc games used less. And yeah - new library also noticeably lags on integrated gpu. There are settings to disable some of effects and reduce amount of used bandwidth, but they dont change much.

I genuinly though Steam was compromized, but then hackers would probably have done a better job at vandalizing the UI.
The old UI never was that great but at least they didn't try to shove all that revolting community stuff in your face.

A study in how not to do it, or "Design 101 fails"

Ironically, their implementation of "What's New" is exactly the same abomination that GOG substituted the extremely useful News subsection for with its own redesign.

I have no idea why this "mobile" look atrocity is so trending, but it's horrible on too many levels.

Performance issues completely aside, which in itself is another "lul, whut?" moment. Valve apparently can't afford not just proficient designers, but halfway decent code monkeys either.

The cherry on top? This crap apparently has been extensively "tested" in Steam beta, heh.

It's ugly, messy, hides information I want while highlighting stuff I don't care about, and emphasises flashy graphics over usability or ability to actually display useful content.

Just like every single web UI redesign ever.

At least it's still not quite as bad as PSN, but then I don't think it's physically possible to be as bad as PSN is without demonic intervention.

I hate that scrolling my games list freezes up now. And my custom Steam skin is gone.

Urrrghhgllghg!

No, not spam, just my reaction when I opened Steam.

In the client click on Steam, Settings, Library and check the box marked Disable Community Content it to turn it off. (It doesn't remove that section but it does stop it from loading.)

I've done that and removed shelves that I didn't want and don't mind it. There are a few tweaks i'd like to make but cannot though.

I love it. It's so ugly that I'll spend less time scrolling through my games trying to decide what to play.

I don't like it. Optimization with new library is pretty bad. Steam gets locked up if i click on library tab, have to restart it to get it working, which Steam never does before. It's still same with 'low bandwith' options.
It still feels like beta. Heh, Gog library looks better than this steam beta.

Buying cheap (hopefully stolen) Steam keys from now on. This is a disgrace for human beings. Thanks, that helped a lot. I also disabled everything else, even GPU acceleration. Now my library works fine, except that very important and needed for everyone shelf "What's new" can't be removed because they know better what is good for me. At least there is a workaround for this, but I have to click on my games list every time I start Steam only to collapse "What's new" section.

My opinion is that I seriously doubt it's a finished product and with all the backlash involved from it, it'll either be shelved and reverted back or they'll give the option on which UI you can use. I suspect the latter will happen.

This is why I never jump to conclusions when something like that is new fresh out of the box. Because usually if it gets a negative reception this has, something changes.

Its fugly.Not really user friend tbh

It's shit. Looks like it was designed for mobile - despite being a PC platform. It's gog-levels of incompetence. Possibly even more incompetent, but since it's Steam, I'm not too emotionally invested. Suffice it to say that it looks awful, feels slow and cumbersome and I'd like the old design back.

Yikes forever!
Script to revert it ... here.

(Thanks to Corvo)

I think the new UI must have been coded by Bethesda because it's buggy as hell and makes Steam crash all the damn time.