Hey!
Currently, the "Local Festival" Endeavours is terribly balanced.
I often find, I don't want the Happiness from Supporting, I only want the Influence from Accepting...
But this creates a dilemma if you're a Diplomatic Leader, as you don't actually want to use this Endeavour - because if the AI supports it you only get +3 Happiness per City, and if they Accept it, your losing Influence not gaining it.
My Proposal is to change Local Festival to;
Cost To Offer Endeavour (60 Influence - Length 15 Turns)
Supported - __+5 Happiness Per City,
Accept - __+2.5 Happiness Per City,
Reject - __-1 Happiness Per City__, (some Leaders could have the negative removed - like Machiavelli)
This would allow for a new (maybe) "Intelligence Exchange" Endeavour that Costs Gold rather than Influence to Offer;
Cost To Offer Endeavour (60 Gold - Length 15 Turns)
Supported - __+3 Influence Per City,
Accept - __+1 Influence Per Town,
Reject - __-1 Influence in your Capital__,