Is there some rhyme or reason to how many resources can at most be incorrect ?
It appears to be completely random(that's also what they have said in the announcement if I recall correctly).
I really hate the fighting system in FoE. It's extremely dull and when you don't have a traz you're pretty screwed in the expedition. So naturally I was excited for this feature, probably even more after reading the announcement. It didn't sound as great but surely a lot better than expected. It was really fun at first, I rolled through the first level in no time, even bought some more attempts with my medals(because why not, I had fun).
But at the end of the first level I got a hint of what was to come...and towards the end of the second level the rng hit me. Up until seven different choices everything is fine. Sure, with five or six different choices and three attempts there is already quite a bit of rng involved but from seven onwards it's just getting ridiculous. Nine different choices is like playing the lottery and it's probably going to get even worse than that.
When you compare the two ways you can use to beat the guild expedition it highlights really how unbalanced this is. When you are fighting your way through you need 48 attempts. You probably won't need much more than that, if you do you're doing something wrong. In comparison to that you need on average 122 attempts when you're negotiating(for more info on that check the 2nd post in this thread). On top of that you're likely to spend some diamonds whereas the fighters are very unlikely to spend any.
My only problem with this game so far is that everything is designed around getting you to spend diamonds. The events are the best example for this problem and the negotiating expedition has the same flaw.
When you have a choice of nine different resources to offer you need two attempts to even determine which ones the tribesmen want and then you only have one attempt left to get it right unless you spend diamonds which, let's be honest, you're likely to do because see very often with your third try you get everything but two or three right and you get the information needed to be sure(or almost sure) which resources the others want. So why not spend 10 Diamonds to get it over with....
It really takes the fun out of it and I'm probably going to build a traz so that I can just faceroll through the fighting part of the expedition even though I hate it because sooner or later I'm going to run out of resources to waste and the rewards you can get are just too good to pass up on.
The easiest solution to make negotiating great again would be to simply increase the amount of free attempts you get to four when given more than six choices of resources.