Pokemon Sun and Moon, What can we learn from X&Y's shortcomings

A new generation of Pokemon games is just on the horizon as Pokemon Sun and Moon have been officially announced. This game implies that the 6th generation is coming to an end soon, as the Pokemon twitter account states that this is going to be a new era of Pokemon. If this is true, this suggests that the 6th generation of Pokemon is ending sooner than most of the generations. Although there's no official reason why 6th gen is ending so soon (I doubt we're going to have an explanation), Pokemon's 6th gen wasn't as successful as its predecessors. Pokemon X & Y are currently the lowest selling mainline games in the franchise. Also, Pokemon X & Y's anime ratings are at an all time low, and fans generally have mixed feelings on the games (myself included). Despite X&Y's shortcomings, I think GameFreak can learn some from these shortcomings to make Pokemon Sun & Moon an improvement over X & Y. So I`m going to discuss what Pokemon X & Y did wrong and how GameFreak can learn from it.
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