Quote Originally Posted by Christmas
Cloud is already very strong even without any enhancement. Notice in FF VII where they show the flashback of the Nibel incident where Cloud threw Sephiroth into the chasm despite being stabbed by him.

Sephiroth plunges his sword into Cloud’s right chest.

Sephiroth: Don't... push... your luck...

Cloud pulls out Sephiroth sword from his wound and throws him into the chasm.

Sephiroth: ...It can't be!
Clouds sudden burst of strength can most likely be attributed to a sudden surge of adrenaline, not uncommon to those in extreme, life threatening situations, coupled with a healthy dose of plot contrivance. I mean he wasn't even strong enough to rate anything more then a "rent-a-cop" class soldier, yet he can defeat sephiroth? I never liked that plot twist due to just HOW contrived it really is. even with the adrenaline factor.

And also note that the question was, why is he stronger AFTER the jenova cells are gone? On a technical level he should have been weaker due to the fact he has lost some of his super-soldier genetics.