As for time savings from quick-combat, I would check it myself, but I am a weak player, so I don't conduct many chain battles; however, if any strong player does a stream (preferably VOD so it remains), I will gladly calculate the saved time (by taking saves and conducting the same battles manually; I don't think that in a game up to the 2nd month more than 15 min is saved on one side).
I think when the last HD becomes stable, almost everyone in the CIS community will play with replayable quick-combat; I'm not sure about foreigners, but I think they will get used to it too.