I propose ZoS change Prosperous into Nurturing: Increases the duration and magnitude of consumed food or drink by X%.

Magnitude in this case refers to numerical value of the bonus being given by the buff. This new trait would increase the duration of the food/drink's buff by X% and it would increase the amount of stats (hp, mag, recov, etc.) by X%.

*The following example is using random numbers just for illustrative purposes. ZoS would need to determine the best % value for Nuturing to maintain balance.
For example, if you had a Fishy Stick that gave you 1000 HP for 60 minutes and had 1 piece of armor with "Nurturing" on it that gave a 8% bonus to consumables, that Fishy Stick would instead give you 1080 HP for 64 minutes.

For CP160 food that has bigger numbers, this could be a significant increase that could warrant competition for BiS with Divines since stats are being boosted by "Nuturing". In fact, this could even provide PvP players with an alternative to "all Impen" to gain more sustain or a larger stat pool, Right now, all non-tank PvE players use Divines because it's the only trait that can give significant offensive bonuses. However, with Nurturing, bi-stat blue foods, Witchmother's, and Camoran all can gain significant bonuses with this trait, by forgoing some Divines slots. Tanks could also utilize this bonus to get more value out of their drinks or foods with recovery bonuses.

It's important to remember that a mixture of Divines and Nurturing is the intended goal of such a change. My proposal is done with the expectation that Nurturing can be used WITH Divines, not to just outright replace it, as that would just "move the problem" to another trait!