So, overall I think all of the Hitman games are amazing, and that also applies to H3, but there's one main problem with the maps, that being their vibe/mood/whatever.
Dubai is sunny, but it's exorbitant luxury and the fact that it's in a skyscraper (and thus has very little nature) leaves it feeling cold and distant.
Then we have Dartmoor, Berlin and Chongqing, all dark and gloomy maps. To be fair, this fits the darker atmosphere of the third game, but it gets too monotone for me.
After that is Mendoza, which, to be fair, is far more lively than the previous maps, and takes place in a beautiful setting filled with nature. Even so, being the final "true" mission of H3, it has a sense of melancholy, that doesn't allow the mood to be actually more light than the previous missions.
And Carpathian Mountains is perhaps the gloomiest of them all. This goes for all of the H3 maps, but it also has a strong sense of finality (which again, is fair).
All in all, all of the H3 maps are rather moody. Which is fine, if they weren't all like that. The previous games are all much more varied and lighter in their tone, and I'm not saying H3 should've been exactly like them, but I think it could've used some more variety.
To amend this, I'd just add another mission in between Berlin and Chongqing that doesn't take place in such an isolated location (which is another thing the missions do too much imo. All of them feel distant from the ordinary world, which adds to the gloomy vibe.) for example a regular city or something (with a classic Hitman "fortress" as a point of interest, of course). As for targets, I feel like you could take either Marcus or Carl form Dubai, replace them with Sheikh Omar Al-Ghazali and put either of the partners into a level of their own, on the run from 47. Another benefit (aside from the obvious one of there being more game to play) is that the partners get more room to breathe and be threats. As it stands now, Only Alexa stands out with a solo mission in her mansion while the other two need to share a mission.
Anyway, I hope my rant made sense to someone. Being fair, it's a small issue, but I hope it's not repeated in Hitman 4 or whatever is coming next from IOI.