Do you believe that the naming convention for the Ticonderoga-class would have continued with the CGBL in that ships were named for battles? Or do you believe that these cruisers would have been named for cities within the United States of America and its possessions as was the naming scheme in the past?
The named for battles thing was itself an aberration...though during the Cold War cruisers were named as leftover from the old naming convention to admirals to states (and keep in mind even during the "codified era" we had everything from patrol boats to 20,000 ton vessels named for cities and don't give me that "named for small towns" junk Y U KNO LIEK TACOMA?) Though there's still a very interesting pattern that emerged:
"Traditional" Cruisers incl. CGs = the old system (we'll discount the ex-frigates as true aberrations)
Nuclear cruisers = states (once again with aberrations but we'll consider those few and far between)
AEGIS-equipped cruisers = battles
There's actually a lot of natural progression in this once you consider the absence of battleships - nuclear cruisers would naturally take up the mantle from them hence the state tag. And previous to the AEGIS cruisers were were two types of vessel that were named for battles once naming systems were codified: aircraft carriers...and battlecruisers (and indeed aircraft carriers inherited them from converted battlecruisers). It's a somewhat intriguing implication: the idea that AEGIS cruisers would through their sensors suite and actual available firepower be able to significantly dictate surface-to-surface engagements in addition to air engagements when since WWII up to that point cruisers were almost strictly anti-air warfare vessels (or at least I imagine this probably ran though a few admirals' minds when it was realized Flight II ships would be able to embark large numbers of T-ASM).
CGBL might return to being named after states as they'd be larger and more powerful still...but it's a moot point. As TimothyC said, it's not even so much an engineering study as is a
baseline study (hence the name) for the specific engineering and mission goalposts any future cruiser design would need to meet. And then somebody decided to render up a doodle for it. Really if it weren't for that doodle CGBL would be nothing more but a glorified bulletpoint presentation.