As a 2/2 with vigilance, that's respectable, and the one time effects are fine too, I just don't think there's really a deck out there that's going to want to take advantage of either one
Fortunately, this is offset by Jin-Gitaxias' rather hefty mana cost, and that each half of it only triggers once each turn
But there are also many situations where shutting down the player most likely to try to cast multiple spells in a turn, while retaining your own ability to cast multiple spells is better
Let me know in the comments and be sure to join the discussion over on Draftsim's Discord
The group consists of Zakeel Gordon, Daniel Holt, David Deveney, and principal MTG designer at Wizards of the Coast, Gavin Verhey
Just pray your opponent isnt playing green-based aggro