I love the new last point. Despite the walls maybe originally being intended to protect attackers, the lack of some is a nice change, providing some small higher ground and a more open and fun area.
I <3 the small ammo packs on the ledges at mid. Although not incredibly useful, they are adorable and a good use of space.
Regarding the area with the new small railing. The barrier itself is somewhat odd and inconvenient. Crouch jumping goes right over it (Wheeeeee!) and I am unsure of how much protection it provides for the health pack. If it could be made less weird/ugly it could be alright. Maybe use a convenient prop or box/es instead?
I did have
this idea but now it seems daft. You would have to put a ramp next to or inside it and sentries would be built all over it, although they would probably be build behind the railing wall anyway. I was just considering the posibility of unifying those ramps and wall to make the area smoother, but it's probably just unneeded high ground for the area.