Its utility can be diminished somewhat in 3-5 color decks if you're not running many basic lands
Mew is the Pokmon that's front and center on these 2 promo cards
The deck slowly builds momentum with lifelink creatures, defenders, and lifegain payoffs like Dina, Soul Steeper and Trelasarra, Moon Dancer, making every life tick count
The reason for the mana value remaining two is because additional costs do not change the mana value of the card itself, even in the middle of casting
That being said, temur is where the energy stuff is and there is some reasonable overlap with energy, artifacts, and powerstones
Theres been no huge crashes of popularity either, meaning that box and ETB prices remain, for the most part, steady