Something great here cometh.
Created as a dedicated assault dropship for the Legio Custodes, the Orion can carry a full task force of the Emperor’s Talons into combat. Protected by frontal armour superior to that of the Legiones Astartes Thunderhawk Gunship, its Arachnus heavy blaze cannon and Lastrum bolt cannon can swiftly clear a landing zone of hostile infantry and armour with brutal efficiency, allowing the units within to deploy before it soars back into the sky to unleash death upon any foe who dares approach.
Here is Hector Cephas' opinion of the Orion:
I think it's great that it's a LoW, I was worried it was going to slip into the heavy support slot. Also means it will be an excellent centre piece miniature for your collection as it is pretty and you only need one anyway!
I think given the Coronus, there was some expectation that the Orion would have a capacity of 16 (8 Custodes due to there being only 8 seats). 24 seems like a pretty sensible capacity and can carry all your important troops to where you need them and due to it being an assault vehicle you can charge out of it so will be pretty brutal unlike the Coronus - something I have heard people people complain was missing from their normal transports.