@Fourkhan
It's extremely simple to change preds. Make us glass cannons. Give predators about the same speed as an elder or ancient runner because at least in the movies and games they could jump from tree to tree. Make us a lot less tanky as you've seen from the movies and games predators aren't as tanky as we have them in-game. Increase our damage a good amount because we're getting rid of our tankiness for speed, so we need to make up for it with a lot of damage. Change the HPC to an aoe stun only, and not a big gibbing mechanic.
Do something with elders. For our damage, we should be killing most xenos at about 3-8 hits depending on which xeno and their age. These would be the things you'd want to do if you're actually serious about changing preds.