If we must live with it, some clear up could help.
1) The huge "Post #..." (under the timestamp) should be swapped with the "RE; .." info (in the left sidebar). This really is the showstopper on this format "working".
2) Remove the floating title (above "post new message"). It is clutter, despite being barely visible. And does not even display correctly in some cases.
The new format just plain doesn't work on an iPad. (no exageration - the width of the msg text box is about 2-1/2 to 3 characters wide with any word longer than that losing the last characters.)
Further, on Safari the text box is perhaps 3 or 4 words - so although theoretically readable, in practice it is unreadable.