Which factions will change most and which factions will change the least in the next EB version? I am asking this because I want to start a new campaign but do not want to play a campaign with a faction only to see that it is much cooler in the new version. I know that Pahlava and Hayasadan will get major changes, so even though I want to play them I will leave them to the next version. The factions I am particularly interested in are the Getai, Sabyn, Sauromatae, Koinon Hellenon and Baktria as I would want to start a campaign with one of these. Can someone tell me if there are some really cool changes in some of these that would justify waiting for the next version?

I understand if the team is reluctant to answer this kind of question as many things in the new version will probably change before it is released, but if I play a faction in this EB version, I will probably never play it on the new one, as I simply do not have the time to play multiple campaigns with the same faction if I ever want to play with all interesting factions. As it is, I do not think I will ever have time to play with all the factions that I would like.

P.S. I am not asking what the particular changes are, even if that would be interesting to know. Simply how much the factions will change/remain the same.