one other thing, and people with more experience than i can help you.....re-examine the way you re-queen. i have been told that there are a number of things that we, who are less experienced, do wrong. one is not letting the hive go queenless for a few days, and another is releasing the queen to quickly.
i'm sure folks here can give you some good advice on it when you are ready.
note on Russians: that's what i started with last year. they were very gentle. they re-queened themselves sometime during the year, and were less gentle after that......later temperament probably had a lot to do with the time of the year. my experience was similar to yours. the original queen was a super layer. from one 3lb package she and her daughter(s) filled 3 deep supers full and gave me honey on top of that.