In Caylus, we choosing favor(s) by clicking favor table, but there are some situation that we lost a favor because UI. Therefore I have some suggestion to it.
a) When a player choose VP or denier favor, and s/he can get more in VPs or deniers track but choosing fewer one (player RED pushed VP track to 4VP but s/he choosing 1VP, for example), it pops a box with "NO!/SURE!" message to alert player (just like passing).
b) When a player choose resource or building favor, add "back to favor choosing" button (like Puerto Rico do) if there are choices in order to reduce clicking error, which will not happen in real game.
a) When a player choose VP or denier favor, and s/he can get more in VPs or deniers track but choosing fewer one (player RED pushed VP track to 4VP but s/he choosing 1VP, for example), it pops a box with "NO!/SURE!" message to alert player (just like passing).
b) When a player choose resource or building favor, add "back to favor choosing" button (like Puerto Rico do) if there are choices in order to reduce clicking error, which will not happen in real game.