I was at this concert. The audio quality in the recording is far from optimal, but broadly reflects what I heard in the concert hall. That is to say: great brass and woodwinds, so-so strings (although the celli and basses were great!), and muted percussion. It was interesting to see what effect Mäkelä had on the orchestra; their response to his gestures was immediate and it was quite thrilling to see. If nothing else, he gives them the encouragement to play, and is not afraid of 'letting things rip'.
In terms of an interpretation or overall conception, I'm not sure there was too much going on. While Mäkelä didn't stand in the way of the orchestra to put its talent on display, he also didn't exactly 'dust off' the score in the way that e.g., Chailly did.
Regarding this being put out as an RCO live recording: Mäkelä is under contract with Decca, so it will be interesting to see how they will handle his recordings in Amsterdam. Does anyone know whether his Paris/Oslo recordings are 'live' recordings? It seems not likely at all that anyone would bankroll a studio recording these days.