Especially since even when you build a wonder, you STILL have to research the Glorious Expansion technology to get any benefit from it. The Glorious Expansion technology should be removed and just made part of the Wonder, to give it any use.

It would limit it though…

Then the app would simply be terminated in another way.

To use as trickle I think that Goats have the best ROI as they cost 35 and trickle 1 food per second. That represent the 2,85% of the investment while cows give 3 food but cost 150 food, which is only 2% of the total cost of the cow. Also they train faster so they start "trickling" before the cow so the total benefit should be a bit more.

Wonders are one of the most useless building in the game. They super expensive in resources and time. I don't know if I've seen a game all alpha where building a wonder helped that team (assuming it isn't a win condition).