Sometimes the decision is made to reflect changes in a meta too far in one direction or another, or sometimes these decisions are preventative, with the team recognizing what could be a problem in the near future and what might not be
The fact of the matter is that there is a very good reason to run 61 cards in a deck that might otherwise want 60mana ratio
An example of this would be when I played Kynaios and Tiro of Meletis, I consistently packed Splinter Twin combo as I would have an abundance of tutors and card draw effects that allowed me to consistently find them for an early game win
Its hard to say which is more likely, but Im leaning towards the latter
If your opponents can barely stave off one alpha strike, the second will do them in
As a kid, you probably tried to justify your Pokmon collection to someone on the basis that it would one day grow in value