Kirton-in-Lyndsey is indeed the new home of 1ACC. The plan was that Scampton's new CRC would eventually take over from Boulmer, allowing Buff to close yet another Stn... by (re)opening two others. Maths, anyone?
Anyhoo, logisically it makes sense to move 1ACC closer to heavy-lift capable airfields in order to ease deployments. Previously 1ACC would have to thunder around the country in convoy to Brize or Lyneham to deploy anywhere. It carries a LOT of kit. Being near, for example, Waddo should help ease this problem somewhat. It also moves us cheerful scopies closer to the rest of the RAF... a good thing or a bad thing, depending upon your point of view.
Certainly, the Fighter Control branch's centre of gravity is shifting massively towards Lincolnshire. No surprises there, then!