I've heard and read alot about current issues with gamma islands, teraforming, and outposts. I don't think the devs ment for teraforming to be manipulated in such a way that it has to limit players from accessing game content. So I thought of a few ideas...
Jetpacks, a module that would allow a mech to jump a set hieight (based upon weight) and come down with a controlled landing.
It would:

• use a great deal of accumulator to activate

• be limited to a few forms of mech(s)

• be directional based upon momentum/direction traveled when the module was activated...
  (ie no movement is straight up & down again. forward at 50KPS would result in a forward direction of similar speed.

• cause damage if landing on an impassible tile and the mech would tumble down till it reached a passible tile or in case of water, die. if falling down a slope caused enough damage the mech would explode. landing to far into water and well looting the wreck would be difficult to impossible.

• make the mech easy to hit due to line of sight

• during the landing have trusters slow the mech down so while landing a mech would be vulnerable and after landing be a bit slow to accelerate moving. (landing would cause the mech to hover a few meters above the ground for a few seconds [1-3 ish])

• maybe disable the targeting system of the mech while it's using the jetpack module to jump.

• require a few seconds of charging before launching the mech into the air, based upon mass of the mech
  (accumulator consumption, landing, and charging time should slow the process enough that it can't be abused for a fast way to travel)

• have a nice animation for the charging, launch, glide to ground, and landing sequences

Yes those walls would be a burden no more... and for city structures well make jumping over them impossible by hitting an invisible/visible side wall of the building. landing on a another mech would be funny but not safe for the mech landing as it will tumble and take damage.