We're in the same boat. We had intended to do the UK citizenship this summer (now actually) but the fees increase scuppered that plan. So now I will probably do DCF soon (as you may have seen, those fees are going up, too, on 1 Aug!!). So we are sending the I-130 asap if we can swing that fee, and proceed if Glenn gets a US job offer.
But I'm very interested to hear about the UK citizenship app concurrent with the DCF because I want that before I leave (if we do).
ETA, cross-posted with tanis - thanks for that - I feel better already!