Missed to check the reply lately. Thanks for all these details.

I didn't upgrade to BF4 so I'm still a bit more in the back. during the BF4 beta I found my box to be a bit under-performing but it was still playable (just not as pretty as bigger can show).

I'll see how it run during the open beta but I expect an upgrade to be mandatory.

It's really nice to see back an in-game browser.
If I understood properly, battlelog will be widely review soon (BF4 first then the rest of the franchise). I suppose it will be deployed before BF1' beta.

I've got an extra question : what about the friend/squad management ?

It feels like they ported a lot of things from Battlefront, mostly the futuristic vibeo of the menus/UI and font

I only got around to testing friend management today since only one other friend that I regularly play with was able to get into the alpha with me.

However, from the main menu, you can move your mouse to the right side to have your friends' list slide out. Click on the three dots next to your friend's name(s) and invite them to the party. Join a server and it tells the party that the party leader (or somesuch) has joined a server, and asks if they would like to join too. It seems a little inelegant. I would rather everyone joined at the same time once enough slots were open but... I guess it's serviceable.

Squad management is the usual. Once you're in, you see the squad listing. You click to join one that isn't full or make a new one. It shows you what roles everyone in the squad has. You can have up to five people in a squad. You can spawn on anybody in the squad provided they aren't under fire or in danger. Pretty much the usual for that stuff.