It it were cheaper, maybe, but nope it is just crap
I played against Jadine Klomparens in round one and immediately realized how badly I was going to get destroyed when I didnt follow up with a turn 2 play against her Jeskai deck, and she proceeded to best me down with a Mantis Rider, while my Brimaz stared helplessly from the ground
If the copied creature is copying something else, then Naga Fleshcrafter enters as whatever that creature copied
In 60-card constructed, 1214 threats is plenty the deck wins on tempo, not creature count
For example, if you put Null Profusion (an enchantment that says your maximum hand size is two) onto the battlefield and then put Venser's Journal onto the battlefield, you'll have no maximum hand size