Averaging bogus values won't really prevent imbalance.
no, but averaging and removing outliers brings it closer to an appraised value of QUALITY than brick count will.
that's the whole base of this idea. brick count doesn't reflect quality, and quality is what you want. using brick count means that people with either big-high-quality, or big-low-quality builds get rewarded the most - that leaves people with small-high-quality builds out of the picture.
A player council is a nice idea, though I think its a step too far. Perhaps a single figure, like in that building mod Wallet made (not RoB).
I'm not sure what a council could do with property value. Are you suggesting a board of people do the value? Or anyone can vote?
having a single figure is too much power for a single person, they'd go power mad (or even if they didn't, it's easier for people to get angry when there's been a single person who has rated their build badly as opposed to a number of people)
as for the council, i'm suggesting either, both would have their ups and downs. or maybe even a combination of the two, player voting with a council to approve/ amend the value (within a limited amount). I just think having a council of some sort included adds a layer of verification AND creates a great platform for RP (vote 1 boltster)
this is all based on the premise that you want to encourage and reward high quality builds. if for whatever handicapped reason, that ISN'T the aim, just let me know and i'll take my ideas elsewhere