I mean...I guess that's the only thing. I guess to my mind when Starfleet has essentially unlimited resources then ship shape can be whatever. But, maybe my simple brain cannot grasp the complexities of Starfleet Starship Ship Shapes.
There has never been a canon on-screen reason why Starfleet designs their ships the way they do. The closest rationale was Voyager’s variable geometry warp nacelles for the environment, and even that was never once mentioned in the show. There has never been a reason why some ships have two nacelles, or one, or four. No reason why some ships have circular saucers and some have pointy ones. No reason why some ships have secondary hulls and some don’t. No reason why some saucers have huge illogical gaping holes in them, and some don’t. Etc., etc.
Now with that said, there has at least been a logical progression of design
attributes from TOS to VOY that one could use to determine by sight when a particular class of ship was constructed, and that’s what we’re talking about here.
1st generation: TOS-style ships such as the Constitution, Saladin/Hermes, Ptolemy, and Federation.
2nd generation: TMP-style ships such as the TMP refit, Miranda, Constellation, Sydney, and Soyuz.
3rd generation: post-TMP-style ships such as the Excelsior, Curry, Raging Queen, Centaur, and Hutzel.
4th generation: pre-TNG-style ships such as the Ambassador, New Orleans, Challenger, Springfield, Cheyenne, Nebula, Freedom, Niagara and Olympic.
5th generation: post-TNG-style ships such as the Intrepid, Nova, Sovereign, Prometheus, Akira, Steamrunner, Saber and Norway.
(All of this was fine until ENT and DSC started muddying the waters, but that’s another topic.)
My point to all this: Nobody is going to look at a New Orleans class starship and think it was built during the TMP era. Conversely, no one is going to look at the Constellation class and think it was built during the TNG era. But now we have ships that don’t look like the era they’re supposedly from. And that’s a bit annoying to starship nerds like me who like logical consistency in my designs.
Does it matter in the large scheme of things? No, because any justification can be made as to why ships look the way they do, because this is all fiction. In the case of the Titan, I would have preferred that they’d made it look a bit less than the TMP-era ship it was derived from, and that’s coming from someone who loves the TMP era ship designs.