About faster techs I like the change. Nothing major imho. Beside it helps speeding up games that I already won (or lost).
Playing on Emperor/Epic at the moment after 5 games on Standard and it seems sluggish: it was a long time that I declared with Spearmen and Archers to harass a neighbour.
Maybe the runaways will become a nuisance (I got Ethiopia and Halle if left unchecked will skyrocket) but the ogres in Damascus are already heaten up the forge. I'll begin the wars very soon.
AIs went tradition (Austria, Portugal), authority (Askia, Shaka, Caesar) and progress (Ethiopia). Amazing start with Grand Mesa and Sri pada in my reach.
Heavy modded playthrough: 3/4UC, EAW, ENW, More wonders, better lakes on a Pangea map. Tried starting with Communitu but no matter what parameters i set it gives me vast oceans, scattered lands and isolated starts. Nothing playable for my taste.
No ruins, no events, no tech trading, raging barbs.