We've finally managed to finish collecting and compiling the stats for the various versions of Even Match. Below is the average round time for a selection of maps over a 31 day period which haven't had any gameplay changes between versions/settings and which reflect a wide range of gameplay styles.
A: EvenMatchV2a5 (05 2015)
B: EvenMatchV2b2 - bBalanceTeamsWhilePlaying=True (11 2015)
C: EvenMatchV2b2 - Map repeat rate 20 - DeletePlayerPPHAfterDaysNotSeen=31 (02 2017)
D: EvenMatchV2b2 - Map repeat rate 27 - DeletePlayerPPHAfterDaysNotSeen=31 (04 2017)
E: EvenMatchV2b2 - Map repeat rate 27 - DeletePlayerPPHAfterDaysNotSeen=7 (05 2017)
The high total round time for C is most likely due to the same type of map being played in a row and players being more familiar with them. Setting PPH data to 31 rather than 7 does produce better results. However, if even a single map such as SlatedWorld was removed from this statistic, then the opposite would be true (setting PPH data to 7 would appear better than 31), so we can consider this setting to have very little or no impact on the balance of the matches.
Overall, EvenMatchV2b2 produces much more balanced matches then V2a5 regardless of settings. Thanks to Wormbo for the tons of work that have flown into it!
Hope that answers any questions our players have about Even Match and it's different versions.