This is something that just came to me.
Putting aside the "Plot Armor" reasons, why was Future Gohan so weak?
We know he was able to become a Super Saiyan and that while he was below the Androids, both SS Gohan and SS Trunk were at least able to put up a fight against Androids 17 & 18.
But here is the question. If SS Gohan with both arms was able to at least put up a fight against the androids, why wasn't he significantly stronger after losing his arm? We know that the power boost that Saiyans get from near death experiences is... inconsistent.
Vegeta after fighting on earthy went from Cui's power to beyond Zarbon but weaker then most of the Ginyu force to being able to fight 1st form Frieza.
So shouldn't Future Gohan get a massive power boost after the near death experience that cost his his arm? But instead, Gohan seems to be the exact same power, if not weaker due to not having an arm for versatility.
Was there ever an explanation given as to why the Saiyan power increase after near death didn't effect Gohan?