The move is -31 on block and has a 13F startup. It is factually in the top 1/3rd of most unsafe ultras. The only ones MORE unsafe are throw based ultras (obviously since they have no blockstun) and DP style ultras that do most of their animation on whiff still (Ryu’s Ultra 2, Ken’s Ultra 1, Juri’s Ultra 2) however in all of those cases, they have really good hitboxes and every single one of them has a better startup.
There are only 2 strike type ultras that are more unsafe, and have nearly as long of a startup. Rose’s Ultra 1 (though it has a really good hitbox that goes long distance it is -37 on block and 12F startup. And Fei Long’s ultra 1 (which isn’t great but it also has more juggle potential and chip but it’s still 11F startup and -38 on block)
The problem is that Ultra 1 is slow AND has a terrible range. If it was Slow but with good range (Abel’s Ultra 1) or fastish but with bad range (Makoto’s Ultra 1) or slowish with bad range but easy to land without meter (Yun’s Ultra 1, Rufus’ Ultra 1) I’d find it more useful. Especially since it’s damage is lower than all of those ultras except Yun’s Ultra 1 (But Yun can combo AFTER his ultra 1 lands with a dash punch and it beats Cody’s U1)
Not saying U1 is WAY worse than others, just… worse. Plus U2 is simply so much better (and other than the fact it is unsafe as all hell on block, whiff, or air hit) it is one of the better ultras in the game due to fast startup, high chip, long range, and versatility.