But GBs don't need any additional buffing (well not most of them anyway).
then perhaps before writing any proposal the question here becomes
if you could pick 3 GBs and boost one of it's attributes what would it be, and why.
I feel the player base will have various preferences based on their own individual style of play.
--- Of course there will be some highly common buildings most players basically ignore today.
--- However if you could somehow enhance those; what would it be and would it be a game changer for you?
--- What would it take to revitalize some of those buildings and push them into a serious consideration or must build column.
in a fast analysis I've noticed for the most part GB's providing coins, medals coupled to happiness, population, and defense are on most do not build lists.
Tower Of Babel
Colosseum
Notre Dame
St. Basil's Cathedral
Deal Castle
Space Needle
Lotus Temple
Voyager V1
Gaea Statue
this varies a little between players and guilds based on objectives or style of play... in most cases though there is a high degree of consensus among these.
from a brainstorming perspective would the Colosseum be worth keeping around if you could go to your tavern and thru two drop downs select your great building and then the boost type you wanted.
in this case Colosseum and Medals
then thru three activation slots select level and duration
for 8000 silver --- 24 hours + 30%
for 16000 silver --- 48 hours +60%
for 32,000 silver --- 72 hours +100%
a lvl 10 Colosseum provides 35 medal a day
even better with a lvl 10 deal castle which provides 170 medals
---- this is just quick and dirty representative example, of what could be done.