id agree the maps in the beta do feel small in comparison to say BF4 maps, i liked the way they did it before if you played an infantry focused game then the maps boarders would shrink to a portion of the map that was best suited to that play style
Diego i found a sneak exploit right after you leave the sewers
in the first dungeon you see after you leave the sewers there is a room with 4 locked doors with enemies behind it you can sneak here without getting caught and power lvl you sneak ability.
You can also lvl it up by walking into a wall in this location and it will still lvl up.