Glad you liked this feature. From your early CSI share, it looked like you voted around 1000 times in a week which is more than me. It needs to read and calculate all those cases.

Your weighted average is a lot higher than your average.
You likely give out a lot of smaller upvotes automatically or more haphazardly to people you just want to support. You don't pay much attention to maximizing curation rewards when doing this (maybe a lot are automatic).
You give out larger votes, probably mostly manually to things you really like or feel need the extra support.

Actually, I think a weighted average of above 50 is great. If you can get it to above 60, you are doing very well. That's my goal. You can just try to do a few less smaller votes for accounts that are already well supported. I've stopped auto-voting for anything already above 15SBD (my tool let's me set this). I rarely vote for anything above 50 SBD manually unless it's really profound or exceptional. It's helping my curation a bit and for the most part I can find more than enough content at this level. Very few authors I follow (other than steemitblog who burns it all anyway) normally hit above 50SBD.