I am so hyped right now that I need to make some kind of wishlist for TLOU2. Here I go:
1. Wide-linear approach with some fairly big areas (even bigger than UC4's), but still keeps it controlled to manage the pacing;
2. Adult Ellie as main character, more versatile and fast with a greater moveset of mechanics avaiable than Joel in the first game;
3. New enemy types, providing more variety for combat encounters, maybe even some infected animals like those early concept arts for the first game;
4. Doubles down on exploration to find resources, especially with the bigger areas, increasing the options for crafting and the overall variety of tools for combat;
5. Doubles down on in-game dialogue and world building via interactions with objects in the scenario and etc! Those moments were the best part of TLOU;
6. Get rid of the simplistic "push barrel to climb" and create some interesting environmental puzzles/traversal alternatives;
7. Story wise, I will just trust Neil. He will come up with something great.