Whew... okay, I don't like the new design at all, sorry dear @michaelson x___x I am sure you all meant well, but... just nope.
I am totally with @blackdevil72 in some aspects. And @Alrathi has a pretty neat list of suggestions, too.
What I enjoyed when going to a new series was that I was RIGHT in it, I saw the latest comic page, I saw the artwork (not just some thumbs) and I knew right away if I liked the style of the comic pages.
Speaking of thumbnails: I am really, REALLY disappointed that the scroll down bar on the left side is gone, me, as well as many other artists, used the top to bottom list of episodes to make an artwork of continuing thumbs. 2 years of thumbnail uploads for the trashcan, it just looks like garbage now instead of a pleasant artwork in thumbs. Why did you change that? I mean, it was a feature I haven't seen on any other webcomic platform yet, it added so much personality and us creators were able to play around and make it more interesting for our readers!
Where's the continuous scrolling of pages? Why can't I just keep scrolling down instead of clicking a button with the mouse OR tap on the arrow keys on the desktop mode?
Where is the webcomic header? It might seem minor, but it is another important eyecatcher for the webcomic.
Why can't I support my fave creators from each page as easy as before? I know that the ink support button is SOMEWHERE to be found. But I really enjoyed the one-click support I had before.
Same goes with the external link, wasn't there some way to promote a link, e.g. to one's patreon? Still haven't found that...
The new design is - pardon - a cheap webtoons ripoff. Where's the tapas charm? Why should anyone feel welcome on a bleak, generic design like that?
Uuuugh, srsly, as much as I love tapas, the new design just won't work... T___T Please, please, PLEASE listen to your creators and go back to the old design... treating a desktop like a mobile just won't work and you made it unnecessarily user-unfriendly...