I am fairly new to HP so I wasn't real used to the old design, but I thought it was easier to get to my home page with the old design.
I liked how the old home page had some of the hubs I had left comments on and a list of new hubs and questions from people I follow. I can't really find that page now. Notifications only lists topics I am following and made comments on. Explore only takes me to the generic areas. The App does have an option for "feed" that seems to give me the info I am looking for. (Sometimes it doesn't get updated so you have to hit "refresh" (the circular arrow) in the upper right corner.)
Also, I find it harder with the new design to follow other Hubbers. I just read a Hub I liked and wanted to follow the writer. I used to have that open at the top of the Hub, just next to or below the title. Now, I have to go to the writer's profile page to click on the follow link. This isn't really that big of deal because I usually check out the profile anyway. I want to see if the writer writes about many topics I am interested in or just happened to have one Hub I liked.
I could be way off base with these comments since I wasn't very familiar with the old design in the first place.