Honestly I'd like see FlyTampa do KSEA, they have the material. Not sure why is not redone like KBOS (not registered on their forum yet).
As for paying a fee, the modern (recent or post-2010) addons (be it aircraft, scenery or utils like REX/ASN) are too good to complain about the cost -))
ps.
still, many people want KEWR and so do I despite the JFK.
I won't be cursing Dzerweski, they did a very good and performance friendly Moscow UUEE - comparable to sceneries done by popular developers, but KEWR is not good. Looks like different person/people were developing these sceneries using different techniques.