I'm going to say this once- The USBC Ball Motion Study indicates that your ball reaction is impacted by static weight by less han 5%. The CG only matters because it dictates, to an extent, the location at which the balance hole must be drilled, which can greatly affect track flare and hence reaction. The location of the CG is otherwise functionally irrelavent.
As far as the OP goes, it has been my experience that some of the Motiv balls aren't always as strong as many of their competitors equivalent products (save for maybe the TR2), however they are still good pieces of equipment.The first problem I get from listening to the OP, though, is that his pin is so close to his finger hole. Forgive me if I'm incorrect, but with most manufacturers that voids the balls warrantee and is unadviseable.
Otherwise, the others are right in asking for the location of your PAP and track and for its relation to the pin. I wouldn't be overly concerned with mass bias location, however, because when one drills a symmetrical ball the mass bias migrates quite a bit. It's more important in an asymmetrical ball, as they maintain their mass bias location much better.
In fact, Storm studies have shown that almost every symmetrical ball sees its MB relocated to LEFT of the thumb hole (and often above) almost regardless of drill pattern. Interesting stuff huh?
Your best coarse of action is to go back to your shop, figure out your PAP and give us its location in relation to the pin and the location of any extra holes in relation to your PAP as well, along with static weights in order for us to better determine the best location for a potential balance hole if we deem one necissary.
If you have any questions you don't want to become your standard internet forum circus, PM me personally and I will answer them.
The thing you have to remember is that you're never "stuck" with a ball reaction. Ball reactions can be changed drastically with only a few minor adjustments. If your ball driller wants to bounce some ideas off of me as well, he can feel free to contact me also. I'll be happy to help as long as he/she is the type that is willing to listen and have intelligent discussion.