I like the direction you guys are aiming for at the moment.
I also agree with Kidkinsey, his abilities greatly diverge. He also gets a boost in range with his extremities. Regen, air manipulation powers, speed or whatnot.
I'd suggest having his last 3 keys and ratings as follows:
Low 7-C,
higher with Kurama's Chakra and Summoning Jutsu |
Low 7-C,
higher with Kurama's Chakra,
7-C with Rasengan |
7-C
Key: Chunin Exam Finals & Konoha Crush | Tsunade & Sasuke Retrieval Arc | One-Tailed Transformation
(It's not too different than what we currently have, but it addresses more relevant events such as the Kabuto fight, the Kimmimaro fight and the like with more precision and clarity).
Also, might be worth revisiting
Neji's profile. Or discussing what Forest of Death Curse Mark Sasuke scales to, if scaled at all.
EDIT:
As a side note, If we were to scale the end result of that new Choji destroying the ground calc to the claim he makes of the butterfly mode being 100x stronger than his previous state, it would bring his yield to 3,4 kilotons, or At least
Low 7-C. Which is consistent scale-wise.