There is no need to beacon the whole height of the world if you want to protect the structure in the sky and the building on the ground, you can just beacon each creation separately. So you would effectively only need 64 (+ a few for the sphere in the middle) beacons for the gleam structure in the sky and another few for the structure on the ground. There is no need to connect those plots.
Forced might be the wrong word but I think the devs nailed it when they posted the patchnotes for the beacon patch:
This isn´t true. The current beacon system makes it as easy to expand upwards/downwards as to expand outwards. So it is as encouraging for high builds as it is for wide builds.