The paved length of 1552m is really irrelevant as you're talking PT movements so the declared distances are what count. So you've got distances the same as at LCY but without the performance gains that the 5.5° glideslope gives you LDR-wise. Restricted payloads due to limiting runways are not popular with operators unless there is some other imperative for using a particular airfield, and that won't apply at Kindlington.
I reckon it will be limited to Q400/ATR types and below, although that still doesn't rule out limited passenger schedules and charters. I also wouldn't underestimate the appeal that small airports have for some travellers who hate the hassle they normally encounter.
Mind you, not a good time to be launching new, untried routes I wouldn't have thought.