Watson is talented at running yes, but when he doesn't run and in the pocket, he's buying himself time by taking steps to the left, right, forward, backward..it may just be 1 or 2 steps for few tenths of a second to throw the ball. It's very subtle and Tom Brady-esque. Not nearly as good but he's getting there. Tom Savage has 0 of this. This isn't athleticism, it's mental.
Probably for the best, it allowed Ellington to get hit and draw a penalty instead of dropping the pass. Calculated. LOL
Savage has zero poise and zero awareness. Peyton and Brady aren't athletic, but they can avoid pressure by taking a couple small steps inside the pocket. Peyton didn't always good o-lines. Savage is too scared to do much of anything positive.