I’d do a leak down test to help make that call.
I wouldn’t be surprised if you find a few leakers from the valves bouncing off the seats.

My feeling is........ I don’t really think anything “moved”.
I think it’s more like someone left out the shims, and that’s how they’ve been all along.
Your installed height is shorter than the head I have here when checked using similar parts........ so it’s not like the IH is abnormally high.

Unless you can come up with another plausible scenario.
(The shims weren’t just sticking onto the bottom of the springs when you removed them?)