Why Cley to Plunk?
That would make the deck like every other Skeelz deck. With Sasha and Dr. Falkenstein you will most likely win a round with low pill count and Cley's ability will kick in with pillz to spare.

Your points are valid.
What my comment is trying to express is, the deck is set up (imo) for the use of Cley. In my experience Skeelz damage can be an issue when using the popular deck builds for them. Although this build does not stray too far from the norm it makes use of a character who can have a great impact.

I did try the deck and had moderate success early week and I will say Cley is not an issue. When playing I felt Sasha, Redra or Snowflake could use changing. Perhaps Snowflake to Plunk and find a suitable 2* maybe Otto. I am still on the fence with Minerva but the deck seems to work well for the author.