Completely agree with your post.
We seem to have lots of maps that are either primarily flat, or flat with some skyscrapers that allow for some unprecedented movement and force projection. I think part of this is the controllability of the parachute and Sundance kits - earlier BF games had parachutes that were fare less controllable, so you couldn't reliably yeet yourself out of a helicopter and land EXACTLY where you wanted. I also do not think chute cutting and re-using were common in earlier titles like BF4 but may be misremembering.
Now we have people that can make the tactical decision to jump off their nest and land on the enemies flank and stack up a skill-less multi kill. It is "fun" for the person who does it, but is gamebreaking for everyone else as there isn't a sensible way to defend against this.
Fundamentally, we are also missing any maps with lots of medium (2-5) story tall urban buildings, a true urban battlefield environment. I sincerely hope Dice can shake things up and give us less maps that lean so heavily on the "flat plane with sporadic building clusters". We need our grand bazaar, our siege of Shanghai, etc.
I have played Orbital quite a bit and have never seen that as an issue. Most of the time there are a few snipers up there that get shredded by a helo, who then caps the point, and then the other team does the same thing. For Orbital, there are two tall structures, at A1 and C2, that provide basically the same thing in terms of LOS. The difference is one is an objective at the top and the other one isn't.
I don't think verticality is the issue. Maybe flag placement, spawn locations, Specialist's abilities, or call-ins on rooftops, but I don't think having elevation in the game is a bad thing. Otherwise, you are essentially playing Doom.
I don't like the call-ins on buildings, and flag placements and spawn points could be a little bit more even in some cases, but for the most part, there seems to be a lot of other issues to address in this game before something like this is even considered. That's just my opinion.
