i kinda like these things. they're kind of like baseline star trek ships, no fuss.
Single role mass produced warships that are most effective in large groups, think Big Wing tactics from WW2, end the fight before it even starts.
Fast and agile, heavily armed and probably heavily automated as well, possibly including hologram crew.
No bells or whistles needed.
Hoping we get some proper information about them sooner or later.
They also seem to be continuing the trend for ships with a lower vertical profile making them harder to land a hit on from the front or side, resulting in fewer decks.
They look like they are around 400-500m long but its hard to be sure using the scenes we got in episode 10, however they could be in the 300m range which would make them very nice compact (Light) Battle Cruisers, about the same length as Voyager but with only 10 decks at most due to no main deflector.
When we saw the two fleets opposite each other the Starfleet ships didn't look that much bigger than the majority of the Romulan rank and file ships, we know they are relatively small which would support the circa 300m range for Rikers fleet, its hard to say for sure at the moment.
Wouldn't surprise me if the Zheng He is larger (pehaps a Heavy Battle Cruiser) and could be a Curiosity class like the Ibn Majid, however that goes against what Riker said about them in the episode as that class is at least 10 years old, I still don't think we saw the Zheng He in the episode as it could have been hidden amongst all the other ships, it would make sense that the command ship of such a fleet would be larger and possibly multi role although it may not be a full Explorer.
Chabon is most likely holding some reveals back for S2.