Yes since patch i lvl up ninja spy from 15 (or 20 i don't remember) to 28 and got Sung Tai Ki, even the 2 other event girls from this last patch (Farmed them since the event started, but not in sleep hours :p)
I believed it was a mistake from the developers to reduce the amount of money you get from trolls, but the C.E. change is acceptable (if the base-reward of bosses gets increased or give more money per level up) give some time to the patch; consider there is a lot of variables to count if you change one mechanic (in this case multiple), so i think they would re-balance the game with some time.