As long as these exist, nobody will actually expect you coming through there, but rather through a less risky passage that is nearby, thus giving you quite a surprise effect in engagements.
Personally, when I started flying in this game, I paid the map barely any head until I started to try to fly around this pillar-thingy. Thaught me how to use a map. So it could be good for teachings stuff too, you get punished for not knowing, but be rewared by learning (the reward is that you don't die on that pillar and if you wanna fly around there you might actually do it correctly).
If you wanna change map restrictions I would suggest changing map height ceiling on certain maps:
On Paritan there are a few of these skyscrapers that have a sort of "tent" in them, on top of them and are open on top too, (screenshot if requested) through which a ship can fly through, but that only works so well, because you get pushed down if you stay there too long. Could be a nice sneak attack setup from above, I mean who expects a squid sitting inside of a building? (As far as inside goes.)
On scrap/dunes you have that juggernaut (it's called "Juggernaut" in the scrap map description for those who didn't know), but you can only enter it from 1 point. There actually is another point on the other side, but you kinda have to go full vertical speed and hydrogen to get past the height ceiling as much as possible in order to go through there. (Every ship but a Spire can do that.)
It would allow for mor dynamic engagements while the team inside the point literally thinks "They are gonna attack right after the next sandstorm", which is true for 90% of coordinated matches on scrap.
The same goes for dunes, for nobody would expect a ship to come through up there and surprise attack certain long range ships.
When it comes to North, South, East and West, I currently like those and yeah, there are less risky paths you can choose from that are pretty close, but it's just that extra surprise that make them worthwhile, maybe on some maps more than others. In my opinion at least.