i agree with what your saying i think the really top players are too one dimensional ronnie at snooker is a freak but i dont think he could be a top pool player, but the lower ranked players cross over very easily and would be a match for nearly all your top players at 8 and 9 ball within a short period though they would need a good 6 or so months to get there breaks up to speed. as for the other games you mentioned i think you need knowledge at those games and that would take time but with time alot of snooker players would be great at these games too. already there cuing is more accurate then nearly all pool players, they just need to adjust to a slightly different delivery at pool