Gus,
Really well done, big fan of your orchestration. Sounds really good.
Regarding the comment about harshness, before you start LPF'ing stuff, I would consider just EQ'ing your reverb bus, i.e. maybe pull it down to 8k to take away some of the reverb highs. I think the instruments are OK as is, to me it sounds more like a reverb tweak would resolve. That said, I think it is OK as is, very enjoyable listen.
Regards