Visionary blems are nothing to be worried about.  I've owned many of the blems and all of them were engraving errors or color issues. 

Too bad this is 16#. 

Line                   Centaur
Color                 Blue/Dark Blue
Coverstock         Particle
Core                   2-piece Asymmetrical
RG                     2.56
Differential         0.062
Intermediate Diff   n/a
Factory finish       320 sanded

Line                   Centaur
Color                 Blue/Dark Blue
Coverstock         Particle
Core                   2-piece Asymmetrical
RG                     2.56
Differential         0.062
Intermediate Diff   n/a
Factory finish       320 sanded

I bought one just out of giggles and put a long pin to PAP layout on it and on a fresh house shot, the ball was going left at the arrows.  I tried standing in front of the ball return and just tried throwing it across the lane and the ball would never get right of 15.  Once I sanded up to 4000 and polish, I could get the ball down the lane and even then, I had to play almost 5th arrow.  The funny part was when some of the people saw how strong the ball was, I ended up selling like a case in the first week simply because they were rev challenged and couldnt get anything else to hook.  To this day it was probably the strongest ball ever produced.  Even the flare rings looked like they were 2 inches apart and flared around the entire ball.

The only Visionary balls that seemed to have a quality control issue were the plastic balls poured in Korea like the Clear Gargoyle.

https://www.ebay.com/itm/225034486274?hash=item346519c202:g:DlsAAOSw6QNirMX0

I was told that the main reason they were blems was because there was a lot of flaking or small particles from the core in the clear. 

There were not too many 1st quality balls of the Clear Gargoyle because they were not poured by Visionary itself.  If you do find a 1st, it is a rarity.  Most of the ones I've seen were Blems.