I was torn on getting an A7ii or the A6600 but I didn't think I shoot enough to justify full frame. At the time I purchased the bodies were the same price but lenses would have made a pretty big difference in price with the ones I was looking at + the A6600 has body stabilization which sold me since I don't have to rely on all my lenses having it.Fair enough. I usually stick to primes. The only zoom I have is the 70-200 F/4 G lens. That one is fantastic, but it is for FF. If you want to go that route, it will greatly benefit corner sharpness. On a crop sensor, the "corners" are actually still in the middle of the glass.
For dedicated APS-C, I can personally vouch for the Sony 50mm 1.8 being a very nice piece of glass. You won't have any complaints with sharpness. The only reason I don't have it still is because I sold my a6000 after I went FF. I loved that camera, but I wasn't using it anymore.
No it was an image size issue for me. Anything over 5000px one side was not uploading. Cropping the images down worked.Could it be a RAW or jpeg file issue, most web sites are set up for the latter.