I think the Enterprise-G would've made the perfect Enterprise-B. At least the exterior. The interior looks period-appropriate. More on that later.
But, since I like the design overall, I'm not going to complain about it.
I've never liked the look of the Enterprise-F, even as far back as when it was first introduced in Star Trek Online. To anyone who does, "Different strokes for different folks."
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Here's the "later": IIRC, Terry Matalas has said the design of Starships at the turn of the 25th Century is a direct reaction to how they looked in the late-24th Century. "We're moving too much in the direction of the Enterprise-J too soon!" or something like that. I equate it with how cars before the turn of the 21st Century were starting to become too circular and aerodynamic, like the "jellybean" 1996 Ford Taurus. Then, at the beginning of the 2000s, they re-introduced hard lines. The "hard lines" of the 25th Century would be going back to the TOS Movie look. Now, in the 2020s, they've gone all geometric with the hard lines in cars. So, it would be interesting, in-universe, to see how the 25th Century eventually parallels (i.e. the 2420s).
In the 1970s and 1980s, cars were all about the hard lines, to the point where they all looked like boxes, until the 1986 Ford Taurus was introduced. I think the Galaxy Class is the 24th Century equivalent of the '86 Taurus. It's also what kicked off what we think of as the TNG Era visually, i.e. aerodynamic. So, bringing back the hard lines is the same as reintroducing elements Pre-Taurus/Pre-Galaxy. I compare the TOS Movie Era ships to cars from the mid-'70s to mid-'80s.
If anyone says, "You're glossing over the 70 years between Star Trek VI and TNG!", I'll say, "So does Star Trek!"