Green makes huge creatures, blue is defensive or evasive, white gives creatures counters, and black and red focus on power first
We already have the non-rotating, Standard-legal cards from the Beginner Set, and now were getting a whole new set of digital cards
In fact, he is one of several useful Stage 2 Water types, so he would be at home in a deck based around Archies that picked out the right Water Pokemon (Empoleon, Swampert, Blastoise) for the right situation
There is a time and place for everything, but Path to the Peak is certainly a valid option
It offers a fun deckbuilding challenge to craft a deck with just the right amount of evasion effects while still maintaining that rat theme
I personally do not value black labels for the same reason