It is hard to understand why did you dumped old UI.
Totally agree.
Personally I could not care less about the carousel, but I can say that modifying the detail card page has been a totally wrong choice in my opinion.
Everything was just perfect in that page on the old UI.
And, regrettably, everything on that page - which had the good fortune to be as beautiful as useful on the old version - has now been destroyed, on both aspects, in the new one.
It has been said it to be more confortable to have everything on same page without sub-pages - but actually, since everything is small, you have to continually scroll up and down. So that: not only you never get any overall view (which you instantly used to get on the old version) but also you have to waste WAY more time in order to find the info, the clip, the pic, the comment you are looking for.
Totem, please revert to the old Detail page, or add a Nostalgia switch to get it back for people who are not confortable with the new one.