People have mentioned that other teams with exceptionally high PDOs played similar styles, so I'm inclined to believe that ("all teams" playing similarly is not what I've observed, though-- many have much more of a "don't overthink it and get everything on net you can" mentality, and honestly that could be a better approach overall, despite a lower PDO).
I don't know if it will continue (the evidence seems to overwhelmingly point towards "no", but I'd like to know why). Style also isn't only dictated by how a coach historically does things, it's also driven by personnel, and the coach adapts to that. Most coaches don't have one set style, from what I've observed, and I've seen them completely 180 their approach during their tenure due to what they have to work with.
I have the same uncertainties about shot percentage, to be honest. Sure, history shows that shot percentage always regresses to the mean, but again, I'm curious why, and why a player couldn't in theory be so averse to shooting from everywhere that they end up with high shooting percentages (even if the worst-case result is that they never get many shots and end up poor players overall).