HEYYY!
The OP has a point and I'll tell you why. (This is not a diss post, I am a fan and supporter)
I just bought KFLL, on the merits of KMIA, because I knew the developer cared about the standard of his work when they got a slap on YouTube
and the only reason I even bought KMAI in the first place was because you made good on the critisism, unlike some other addon scenery builders out there churning out rubbish.
You literally craft these airports, by hand, and not only that you add stuff you don't really need to such as extra downtown buildings, and other stuff and a lot of it, love went into the creation and it shows, BUT
Some of those textures could use an upgrade, the main terminal sign "welcome to FLL" could use a bump.
This is what happened to me, please hear me out.
I love Florida, there's only two main airports that are worth buying, KMIA and KFLL (consider making the Orlando airports please) So my copilot and I started out in the Arrow IV Turbo on one of the general aviation parking spots, right outside the Sheltair building, So I immediately go into "Showcase" and step out of the plane and my heart sank. (A bit like my heart sank when I bought an addon for Marathon from some other scenery builder) So my first impression of KFLL were these really really bad outbuilding textures probably left in from the port over from FSX?
Of course then you go around checking everything (do not get me wrong, it's so easy to pick out little things and overlook the bigger picture which is the masterpiece. Overall, KFLL is amazing, I have mentioned it in other posts how I feel about your work, but please do not go down the route of "others" and ignore that it's 2021, this is MSFS2020, not 2004, there is no reason to use shockingly low resolutions and you cannot blame VRAM.
The front doors on the Sheltair building, some other outbuildings, I think need attention (when you can) not by just turning 128 x 128 into a 256, add some sharpening, no...redo them, remake them to the standards of MSFS default at the very least.
It should look like a shop front, not a pixelated hell
and these generic higher res textures can then be distributed between all your addons for generic, or outbuildings etc. I am not going to go into everything I checked out, that is not going to help, but just an acknowledgement that at some point you would consider it is a start.
I might even check that out myself and see about modding the low res stuff myself (for personal use) because it's important, I have a diamond in KFLL (and KMIA) they just need a little polish in some places that's all.
Bless you, keep doing what you do and don't take this little gripe as negative criticism, we all only want the best right?