So the patent for a screw down case and screw down crown was Rolex? No.
I don't disagree that Rolex was ahead of the game in the robust/purposeful watch field. But to say they invented it....well. But that's the case when there's any claim for a 'first'.
As for Rolex reclaiming its 'tool' watch roots, this ship has sailed. They'd merely be competing with the latest hulking dive watch with 10^10m WR, yottaGauss or whatever ridiculous claim is next. The 'tool' watch (I hate this term. all watches are tools....to tell the time!) has moved on. A Casio PAG40 is more 'tool-like' than any modern Rolex could ever hope to be.
You comments on the latest 're-issues' are spot on. Particularly the new Explorer II. Attempts to reclaim the past need to be precise. JLC has done this successfully with the Deep Sea, Polaris, etc, the bizarre hands on the neo-Freccione are just....lazy?