I had originally posted this two weeks ago but am reposting because I did not get any reply from the staff. This was exactly I had posted.
That on the home page, all the new problems must be sorted according to categories, instead of all type of problems mixed up on a single page. It'd be better to have separate pages for each 'Best Of' Categories and from there, to watch the shared problems. The same applies for the 'Started' page. But where it's needed the most is the 'Favourites' Page. I think, it will make the site organised as before.
Plus, I see no harm in reviving the Prizes function. Though most of the users did not claim the prizes, it motivated them to continue visiting the site.
And lastly, I can no more see the the panel which used to show newest discussions on the home page. It'll be good to bring it back.
Hope to get a reply from the staff.