hmm… there was one here when i talked about how it would be annoying if people could stalk you on pvp worlds and then always kill you, answer
think there was one more, will try to find it.
one more
but again, a pretty neat idea without a doubt, i just dont think it fits in oort, since it kinda contradicts the entire purpose of beacons, they might add if enough people want it and it is possible though 
EDIT: thinking on it there is actually a game called ‘‘Block n load’’ which is precisely what you have been talking about, 2 teams starting at a standard base, getting a few minutes to change it with traps and then they have to get to the core of the opposite team’s base, it might be worth a watch to see if it is something like that you might enjoy? i think it would also be easier to describe a good way to do the system when comparing it to that, if it is generally painless, not forced, and wont take alot of valuable time, it would indeed be something to set the game apart from other voxel games 