Personally, I reckon the UC omnishambles has precisely nothing to do with IDS' theatrics. Govt IT overruns? Blame the civil servants and move a few of them on. The blame for any IT fiasco would never have landed on IDS' desk.
The real reason: 100% #euref and the opportunity to stick many knives into the IN camp, 0% UC, 0% genuine concern over national cohesion or 'caring Conservatism'.