The feats aren't nearly worth such a crappy attribute setup. Hell, even if you restrict players to the standard array, putting the 14 into Con instead of Int and applying the human +2 to Wis instead of Cha weakens the warlock far more than getting the feats improves him.Those feats were designed with the intention that all characters would be made using the Standard Array. You end up with a good range of ability scores that allow you to take feats of this nature. Yes, this means some of your points have to go into non-core abilities, but that's part of the game now.
Fey Pact Warlock (Human)
10, 11, 12, 13, 14, 16
Str 10
Con 14
Dex 13
Int 12
Wis 13 (11 w/ Human Bonus)
Cha 16
You now qualify for both feats without overly gimping yourself.