Not sure about Origins as I haven't played there in a long time but on Atlantic that teleporter/gate has been missing for years.
It was there originally but at least 8 yrs ago on Atlantic it simply vanished. No explanation was offered.
The spawn area on the other side of the mountain can still be accessed by very tricky teleporting above the altar closest to the
small patch inside the mountain. Once inside the small patch surrounded by the mountain, move to the far north side closest
to the large area and teleport in from there. Reverse the process to get back.
Its REALLY a pain in the arse and I have died more times then I'd like to admit by getting caught inside that small patch
when the spawn levels up. I then am forced to use the Help Stuck option because rarely were others on my team able to
figure out the spots to teleport. Another option is using a boat but that's almost as bad due to getting off and on the ship
along that mountain coastal ridge.
The right teleport spots are small and difficult to figure out. It takes some time just clicking around to find them but it can be done.
I'd recommend anyone planning to spawn there to go when its dead and figure it out 1st.
I most definitely agree that the gates/teleporters should be put back but I gave up waiting and figured out a way years ago.