Ok, keep in mind the following are only MY thoughts and opinions, and this is the first motor I have rebuilt....
In regards to the balance of the piston,,,,
If you were to take material from one side and not the other, this would cause an off balance, and would make the piston want to "tilt", under the stress of high rpm, causing the difference in weight to multiply, I would think the piston would want to tilt more and more, like a see-saw out of balance.
This would in turn, cause higher wear rate on the edges that the piston wants to tip to.
In regards to the oil angle and hit zone,,,,,
No, it does not alter the angle the oil will hit at, as all the mounting surfaces are parallel, and the squirter is not bent.
The hit zone is a different story.
As the squiter has been twisted, it will now hit a different part of the piston, but keep in mind, they are different pistons being used.
The oil still hits the bottom of the piston, as intended, just in a slightly different place.
Hope this helps.
Again, my views and opinions, others may vary.
I appreciate the feedback and interest though guys.