Stats wise it is obviously somewhat smaller the the Danube but is still quite capable. Having a crew of 3 (pilot, navigator, ops) and a capability to carry additional personel. Having its own transporter (single) and 2 small quarters and a galley. 2 Pulse lasers (front at the side extrusions) and 3 phaser emiters (2xfront at the top of the canopy and 1xaft). It has no room for a torpedo launcher. Additional modules (Sensors etc) can be added on hardpoints located on its back behind the deflectordish (the areas on both sides of the exposed machinery)
Max speed is warp 4.25 compared to the newer Danube which has warp 5 as its max.
Very nice design concept. Not sure about "pre TNG era", because it would fit in pretty well with that and since the Enterprise-D was comissioned in 2363 and you put 2364 on there, that'd be right in the middle of TNG!