Hi, very nice attemp to recreate this beautiful orchestrations. Firstly I think you only used Special Editions and than I read that you have full libraries. You definitely should use more articulations - in VST mockup world you often need to use quite bit different articulations that is not written in original score, just to achieve tme most realistic interpretations. for example on lead trumpet from beginning it seems you are using only legato, you can try to use portatos on that repetitions, it will sound more natural, etc.
As for MIR, what space you use? It sounds like in cathedral - I will use less reverb mix ratio overall. Do you also use MIRacle plugin or just MIR?