Pouncing short range is like zapping (in most cases), it's just not as effective.
But the original intent was to propose one of those changes that's realistic and helps slightly tweak game balance. Dragoons dominate most stage 1 human teams. Any changes would need to ensure that the aliens s2 disadvantage were not made any bigger.
And I may be going out on a limb, but I far from suck with aliens Paradox

.
And tyrants cant stand around a corner with trample charged

. And since when does anyone use trample as their only means of attack?
Making it so you can't infinitely charge pounce shouldn't nerf your pouncing of humans anyway. You'll still deal the same damage. You'll still be able to pounce people to death. It's just more realistic and a slight change that could help balance.
Oh, and if you have pounce charged, slowed walking doesn't matter... at all... when you can release pounce and go a lot further faster.
If I were savvy with modding, I'd write up a mod for this to let it be tested out. But just ask yourself how much of your playing as a goon relies on sitting still with pounce charged and realise it wouldn't be the end of the world :/.
I like playing devil's advocate though

. (I've also always wanted to here more goon related sounds

)