Problem is that each totem is an individual item, you would have to drag the stuff you want to sell on it across half the map to place it on any at Founders.
Lot of work hauling stuff across the map on Peace, pretty much suicide on War.
So your idea will end up just like all of the other "trade centers" we have had, empty and unused trade totems that eventually get deleted and never replaced.
Jordi has far too much on his plate atm, so a redesign of the trade system probably isn't even on the horizon, but what I would like to see is each tribe has it's own trade system, that way it doesn't matter how many totems I place, anything I place for sale on one shows up on all of the totems from my tribe, and can be bought and collected from any of them.
With a system like that then a Trade Center at Founders would work, who knows it might even kick start trading in this game again.