Yes we did but I see some of our viewpoints on it is rather different. Maybe the best we can do is shake fists and agree to disagree.
I do accept that the whole Potions thing skipped my mind but you are forgetting that the potions are a just another service that Ziva's people(The Priestesses of Quetesh) provide to the people you just have access to a Chalice to make those Potions if you bring your own ingredients... a Chalice That you/MC got back for Ziva. A Chalice while getting which you saved her Ass from getting raped by a Giant and solved some annoying puzzles.
She gave the MC Lodgings in a Temple that He recovered from a Clan of orcs for her. I don't like being sarcastic but What a Saint she is. As for the the Kitchen/lab thing ...the MC gave her 12 rare Crystals and recovered a gem from a dragon and since I haven't finished that quest in my main save or an exploratory one I cannot argue if her pay was or was not sufficient. As for the Threesome with Grug and Ziva don't be mistaken she isn't rewarding you she is using you to activate her link to her Goddess.
Also I am not sure if Grug only get's her ass or both her holes before MC gets a turn I saw that scene some time ago.
TLDR: to recall
MC : Brings Ingredients, Breaks her Curse,
Get's her Chalice,
Get's her Crown,
Liberates her temple from Orcs,
Gets her 12 Crystal eggs, get's her the Gem from a dragon.
Ziva: Makes MC Jizz on an Old Witch (which idk if it counts as positive or negative I guess it would depends on personal kinks)
Asks for 80 gold to use the chalice MC recovered.
Shares the recipes to potions her order uses for profit and gives access to the chalice MC recover.
Lets you have sloppy seconds on her vag.
As for the reward for the Eggs and Gem I cannot say since I haven't gotten there yet but it seems satisfactory to me since as Kukothemadhatter said you get to knock her up in the Threesome scene.
I won't even start on how Ziva's quest for the Crown has unleashed vampires on the little town that wanted to drive her away for their safety and yes the MC and Ziva are both responsible for that it was MC's carelessness but it was Ziva's quest.
We don't have to agree on it Man you enjoy the game how you enjoy it I enjoy it how I enjoy it but we both love the game. Also to me it just seems The MC hasn't been reimbursed properly yet. Maybe I am being one sided... but if I am...I am on the MC's side for sure.