After you obtain 9th level access you won't really suffer any mechanical loss that can't easily be made up, like Slot wise you're clearly coming out ahead and there are plenty of +1 CL Items/Feats/Spells out there. And if your game has an intended cutoff point, say level 10, you have pretty much the same deal there too.
Also did you just read Darkwing? I almost slapped Nightmare on the end, 7/level/day, freebie Fear, already meets Requirements, etc. I just got more focused on how to pick up Uncanny Forethought which is a pretty tight pinch without a Pact or finding a PrC that grants a Bonus Feat.