After posting above I went into the windows performance settings and made further adjustments under Custom ( I never "let Windows manage" the performance settings), reduced/stopped some more settings I normally use like shadow under mouse etc. Anyway EoT time tonight has been in the 3-4 minute range, mostly 3. But still that seems excessive compared to what is was just 2 weeks ago. Largest Civ of the 9 "players" has 29 cities, followed by 28 and then my 24 and then the rest except the last place has 19-11 cities, with last place showing 2.
JosEPh