The Connie is also possibly an older ship then some of the ones we’ve seen, though that still makes the shenzhou the odd one out.
Only if we assume the class of the
Shenzhou, the
Walker class, is older than the
Constitution, rather than vice versa...
There's nothing solid on that in the dialogue yet. We don't know when the
Walker was launched. We don't know when the
Constitution was launched, either, but we know the
Enterprise of that class was launched as late as 2245. Then again, the
Enterprise has a registry in the 1700s, but there are members of that class with registries in the 1000s range - perhaps the
Enterprise is a very late specimen, built to the specs of bygone days for reasons of maintenance logistics? The registry of the
Shenzhou falls in between, at the 1200s, but again the
Walker might be from the 700s for all we know.
The final datapoint we are missing from all the cases is a launch date or at least stardate derived from a dedication plaque. All DSC and TOS plaques lack that information...
John Eaves speculates (so not fact) that there are round nacelles under the blocky housings and that the current design was future proofing for wide adoption of the spore drive.
...Yeah, I rather doubt there would be angular warp coils in any warp engine! But why double
nacelles, rather than just square holes for round warp coil pegs?
We see three or four distinct angular nacelle shapes in the numerous background DSC ships: there's a basic shape that might be common to
Malachovski and
Cardenas, say, even when
Hoover has a completely different shape. If Starfleet wanted to prepare for an upcoming superdrive by commonalizing old engines for "fitted-for-but-not-yet-with", why would it commonalize separately? Why not put the same "waiting for mushrooms" box on top of every pylon?
Most of the ships do have round domed bussards, something mostly unique to TOS.
...Or TNG. Or ENT. In fact, only the TOS movie engines appear to lack those (but there are half-domes of sort slightly aft of the very front tip), and the VOY engines have their domes split into little red fingernails.
The DSC ships just appear to have
multiple domes, sometimes a big one at the center and flanking smaller ones, sometimes two or three big ones side by side. A round housing would be less suited for this than one with a rectangular cross section. Why the extra domes? Does
that have to do with the upcoming new drive?
And is it related to the trio of round holes at the bow of the TOS ship saucer? Those were oOo in the first pilot and OOO later on, echoing the DSC dome layouts...
Timo Saloniemi