“The quality of the mesh is perhaps the most prominent area where the quality lacked”
In REIs defense, what you’re seeing here are “pulls” or “snags” in the mesh which are misalignment of the strands but these are reversible and not really REIs fault.
The lightest (0.5oz) mesh forms pulls/snags substantially easier than heavier mesh (0.65-0.9oz). It’s an industry wide issue and not really a quality problem so much as a limitation of 0.5oz mesh. This mesh will form these cosmetic imperfections substantially more easily, but then heavier mesh adds a few ounces to the tent, so cosmetic (and reversible) imperfections are the price of saving those ounces. This occurs from strain on the mesh, such as contact with velcro, stress during stuffing, or if the vent struts or poles get jabbed into the mesh during pack up.
It’s affecting tents from all brands that use the lightest mesh, which is why many tent companies are now creating videos on how to reverse it, such these videos from MSR and SlingFin. Those videos do a good job showing how to reverse it. Basically you can hold the mesh tight and give it a scratch and those will reverse.
It would be nice if 0.5oz mesh was more resistant to this, but for now it’s an unavoidable trade-off with using 0.5oz mesh. I think it’s still worth using this mesh because it’s substantially lighter and the problems are only cosmetic and reversible.