I'm not in favor of this proposed change. I especially don't like the justification for the change being a comparison between bi-ped and dragon schools being the basis of the change. There is just too great a risk of unintended consequences when comparing a multi-school system (bi-ped construction) versus a single school system (dragon construction).
Right now I like having the choice of switching between miner/gatherer and a construction school or just staying in the construction school while harvesting resources and creating building parts. There are times I want to take advantage of this choice when I want to emphasize leveling miner/gatherer. Then there are times I don't (like when building for coin) and wish to have all the exp applied to the construction school. Please don't limit my choices in this regard.
That said, if you want to better equalize the exp gain for bi-peds in comparison with dragons, then, 1) introduce more community construction projects, AND, 2) reintroduce exp/coin quests with the construction trainers like the old days.
The last thing I want to see is a move towards a dragon-like single construction school system for bi-peds. Bi-ped lore just won't support it, if you get my drift. Bi-peds are naturally multi-discipline creatures if given the choice.