Alright. We can keep them, but...
Lei-Fang's OHs are sped up two frames, but base damage drops to 15.
Jann-Lee gets a 10 point increase to Dragon Gunner's base damage, but automatically follows up with a taunt afterwards.
How about no. You guys are crazy. No nerfs are needed to either of these characters. Some of the other characters need some improvements and the system itself needs a few tweaks. That's it.
On OH's, LF is supposed to have them as she is a hybrid character, strikes and grapple/hold.
Jann Lee I can see some merit to his throw bring normal, but a little faster, but you'd just be swapping one meta choice for another. To beat his OH you duck it (and risk a fast mid), or counter throw it.
If it was a regular throw, you would be able to duck it, or counter hit it with a strike, take the risk that you are hitting JL fast enough to beat his strikes.
Which brings me back to the original point that its better to improve the other characters so that they can counter poke properly, or sidestep properly.
No need to change the OHs.