Morning mate, I wouldn't worry about boost killing it because of the pistons height mate, I doubt that will be an issue unless the pistons were very thin before they skimmed 4+mm off them. A quick call to accrue should answer that one. Integrity wise its probably absolutely fine. What you end up with when you reduce compression in this way is an engine that just isn't as efficient as it should be, and they can be a bit tricky to get absolutely right as they tend to require a bit different fueling when the squish band has been removed as the charge behaves a little different as the piston approaches TDC. (Oversimplified)

Detonation can be a bigger issue when you reach optimum ignition angle as the lack of squish band can cause some odd mixture pockets around the cylinder, but the bottom line is, as long as its mapped live none if the above should be of any real consequence to longevity as it should all be just fine. It will just be a bit down on torque and feel a little less "punchy" than she would have where she still 8.0:1.