As others have stated, your scan looks fine, if not HOF caliber (as you say). Use the advanced disc test if you want more detailed criteria on deciding if a disc is good enough or not, the POE values are quite an interesting parameter as I find they usually correlate well with PIF levels.
If they were my discs, I would scan at 16x aswell, 8x can hide some potential issues (which 16x TRT can also show, but not always).
Also, it is very dependant on what you are using these discs for. If it is just for expendable uses, then scanning is mostly unneeded. If, however, it is for archival usage, then test until your satisfied IMO.