First of all Battlefield 6 team shared an image that covers the beta results, and already claimed Battlefield 6 as the most played Battlefield in the game series history. You can see that image below.
Weapons
At the release, we will get changes to the gunplay to make it more rewarding, and shotguns will be fixed, so you won't be able to annihilate the whole server with it. The time-to-kill and time-to-death are considered to be changes, but they will share more info later if any changes to them will be made.
Movement
Battlefield is not a Call of Duty, and every fan will agree that it should be well-balancled close to the old games in the series. Fortunately, developers understand it, and the movement will be much harder, especially when shooting while jumping or sliding. The main idea is to make the movement predictable and not that fast.
Maps
One of the problems on the beta was players who abused bugs, and killed others from the roofs that are not considered a playable area. It is promised that we won't see such players at the release.
Many players complained that the maps are small, but as developers said, it was made intentionally for testing purposes, and the game already has big-scale maps