1.) An upgrade for foragers at Tier3 or 4 that lets them transplant more wild crops in the same way that Blueberries can be transplanted.
2.) What would be really cool would be a specialisation choice, so instead of just a straight upgrade, you get a choice of buildings specialising in one crop, e.g. herb garden, mushroom farm, nut farm etc. You’d have to supply x amount of the wild crop to build the farm.
3.) It would be a great surprise to discover concentrations of one crop on the map, where you could set up an early game specialised farm.