Weird that 2384 Protostar looks much more advanced than 2401's Stargazer. Holotech panels everywhere, protowarp drive, industrial replicator on board...
ST: Picard ship designs are more or less straight out of Star Trek Online (some of those follow sharper lines and are less smooth overall).
In fairness, I wasn't a fan of the refit Stargazer design. It has a lot less 'flow' (far more interruptions) to its design compared to previous ships.
Even the orginal Constellation class 'USS Stargazer' had more sensible connection points for it nacelles (despite being angular)... whereas in ST: Picard, the upgraded ship seems to have unnecessary angular bits upon bits upon bits - and despite the fact the class of ships looks pretty much the same as a previous one, its apparently a completely NEW class of ships (take the Nebula class for example... slight hull changes end up being named a different class, whereas it would make more sense its the same class of ship just upgraded or in a slightly different configuration depending on the mission profile it was originally assigned to).
Same with another ship design seen in ST: Online. It was a adapted to be a different class of ships in the 23rd century (which made no sense to me). The visual differences between the two ships were too subtle to make them a different class of ships.
It would have made sense to make them the same class of ship and say the 25th century version from ST:Online (as used in the 23rd century) was a contemporary upgrade of that same class of ship from 150 years ago.
Same thing in ST: Lower Decks. The Obena class makes a lot more sense as a 2380-ies refit of the Excelsior class... but instead, its a completely different class of ships which was made in the late 24th century?
It seems unnecessarily wasteful (and confusing) to be honest. You have existing Exelsior class ships and advanced technology (replicators and transporters) which can effectively reshape anything you have, and they decide to retain 80% of the Excelsior design and then just slap on a more oval saucer, Sovereign class nacelles and deflector on it?
Nothing against the design as such, however I'm just saying it makes more sense as a late 24th century (aka 2380-ies ) Exelsior refit, rather than a new class of ships.
The Protostar on the other hand follows more of an evolution of pre-existing ship designs (retaining a flow from one section to the other) while sharpening up some parts of it (but retaining overall smoothness to the design).