you can still put a beacon at the base of a planned wall and TF the wall to the sky in a fashion that does not move the beacon .... but then it is less efficent than placing the beacon in the center of the TFed area.
So its not a huge problem you can still do the same but at a higher cost ...
a good balance may be to increase the area of effect of the beacon itself and leave the 350 meter restriction in place.
but a Ludlow stated this comes into play mainly with mega TF projects
Tux ~ Kill the messenger, he was part of it all along.
Euripides ~ Ten soldiers wisely led will beat a hundred without a head.
Bertrand Russell ~ War does not determine who is right - only who is left.