The large LDL in SD is great for bulletins and warnings, but I personally prefer the smaller LDL in SD for showing general information as it seems just right to me in terms of spacing.
The LDA combined with the 5-day LDL in HD just takes up way too much space. I even wonder if the remaining picture you see fits within SD screens.
I don't think that HD configuration could stay up for long without some people complaining that it's too cluttered. That's just my fast opinion as I was looking over everyone's snapshots and videos of it along with what I saw on my end, and TWC definitely needs to do something with that vertical blue bar as it was pretty easy for me to spot in HD.