In general i'm fine with this contest and i think with only a little tweaking it could be better.
Re heads up prior to contest.
Much better and sending link to forums (next working link) a useful innovation. Gives prior knowledge + opens up forums to those that do not use them.
I do think that the strategy part ie fp/col/exp should have a bigger impact on overall score. And would like to see slightly higher points for this. We all know the current released toon plus two random others will be used and i like this as it forces us to use unusual combos. It is important that the random toons change from week to week.
Mostly ok but think the jump between tiers should be more linear.
I think thought should be given as to how many stones required to spawn new toon. These rewards would be fine if not for 80 stones required to spawn. Perhaps all new contest toons should be 2 star.
Re skin happy that its available at 5%. Also think it is well worth Gree's investment in dev time to have a new skin for all the weekend contests.
Overall an improvement from previous weeks. And regarding cyans non inclusion am pleased it was mentioned up front.