This is my second Fly2 airport and, thankfully, it seems they're improving with each release. While not perfect, Valley seems to correct a number of issues previous airports suffered — but I feel the dev needs to pay more attention to quality control.
The most annoying niggles here are numerous gaps in the perimeter fencing (including around the main terminal), the wig-wags casting their light onto the ground in the wrong direction at night, and the frankly unreadable (i.e. blurry) aircraft type ground markings on stands.
What has been done to a pretty high standard is the general texture work, particularly on the jetways (which seem to very accurately reflect their real-world counterparts) and out on the aprons, taxiways and runways. The new custom ground signage is impressive, too. The terminal landside could do with a bit more life but looks decent. Similarly, the airside ground clutter is slightly sparse but there is at least some, and it is custom-modelled.
I'd really like to see some modelling outside the perimeter fence — an idea this dev currently seems averse to. Since there's no PG in the area, it would be great to have a few POIs to look at while on finals.
This could easily be a four-star airport but, as it is, there are just too many little flaws which collectively kill the immersion. Fly2 simply need to take more time to ensure all issues are ironed out prior to release.