Oh it is.
The thing is that it's hardly even a matter of "more" or "less" chemistry. There isn't any chemistry. They basically never interact as adults! You, the player, never really get to do anything with her to understand what she means to Noct besides choose some dumb line to put in some journal that a dog carries!
And that's the biggest slap in the face too. All this buildup of finally 'meeting your bride to be', and we get no casual interactions between them to give off the feeling that they ever had any history. It's a dumpster fire!
And in Altissia of all places too! The most beautiful location in the entire game! I'm the last guy who's looking for romance in his entertainment, but fuck, how did Square miss that golden opportunity to have some genuine interactions between the two of them in video game Venice?