A shuttle coming in to land would not be travelling very fast, maybe a few metres per second. Also the Impuls vents would have some armouring to resist hostile weapons fire plus the pressures exerted by the several billion tons of particle and Helium thrust generated at maximum power output. An impact with a shttle craft would be like a bug hitting a wind shield by comparison!!
I think that the model would be better suited as a test bed conversion set in the first couple of decades of the Federation, maybe around 2270, just before the Moskova entered service. The ship could be a prototype refit test bed for new technology, hull designs, systems, etc. before the Moskova even hits the drawing boards.
There are supposed to be 50 Daedalus Class cruisers built, 25 by the UN before the UFP formed and another 25 built afterwards as warships by the UFP. This could also be put forward as the warship version, as the UN built ships were the exploration versions.
As only the exploration version has been mentioned canon and the mention of two different versions exists in fanon, so I'd put it as the UFP built warship version built in the 2260's, with all the input from the various UFP member race's best star ship designers and engineers.
I'd label it a Daedalus Mk.II., a refitted Daedalus as with the TMP Enterprise was a refitted Constutiion.
As for weapons back in 2260, weren't all retractable cannon types back then?? All would be hidden in bays behind armoured gun ports.
The UFP warship Daedalus is listed as carrying missiles and torpedoes, on top of the retractable light energy based weapons such as Phase Cannons, Lasers, etc.