Evolution of the species in pool is hopeless. The evolution required of pool is in its preparation. Fortunately that can happen if the pool force simply gets crackin'...Man doesn't evolve enough to matter over hundreds of years. Better nutrition and health care makes a difference though. For several generations the average height in the US was growing about .75" to 1.0" a generation. Now that the latest generation comes from parent stock that had much the same advantages the generational height changes have ended or even went backwards slightly.
I think if the older generation pool players came to today they would adapt rapidly and be competitive, they were used to adapting. If today's players could go back 50-75 years they would take a little longer to adapt but most would be competitive back then also. A few might not be flexible enough to adapt.
If Willie Mosconi in his prime could come to today and tour for Brunswick a year I don't think anyone in the world could touch him playing 14.1 afterwards. Not that we don't have great shooters today, but those great shots are often because they have to bail themselves out. You could wait all day and not see Willie make a mistake. His best shots might not be better than today's players but he was more consistent with the bread and butter shots than anyone today I believe.