What makes it different from Enhanced Block Entities (also reduces lag caused by block entities and is already approved)?

I don't think you do

Basically (idk for sure, but this is how I think it goes), avatars are stored in a database as URLs (like https://autcraft.com/forum/topic/3886-how-does-the-autcraft-website-know-our-skins/, but instead of that the link leads to an image) and by default it's an URL from a website which lets people fetch images of player skins (and the avatars we see!) based a player's UUID or username.

AutismFather:

We've also made it so that you can now hug your pets, or virtually anything else of yours too.

Now you can do /hug cow, and the closest cow to you, within range, will display hearts above it. This works with pig, chicken, wolf, cat... even creeper, zombie... just make sure you spell the name of the entity correctly, for example: /hug armor_stand

Now players can show their pets some love by giving them a hug and their pets will return that love!

I don't have time to join Autcraft at the moment and see if this suggestion is even worth posting...

If I remember correctly, previously the tabcompleter only suggested players' usernames. I feel like it should also include the IDs of the entities you can hug (pig, chicken, wolf, cat, creeper, zombie, armor_stand, etc.) and maybe have that list be limited to players and entities within hugging range.