In S3 ep. 15 - The Wrath of Savitar- when Savitar is released, he doesn't seem to be moving that much faster than Barry, and Barry even takes him on. Jessie Quick seems to be able to give him a run for his money in the next episode too.
But the first time we saw Savitar (when Wally ended up in a cocoon)
from Barry's point of view, it looked like he was moving just as fast he does from the point of view of normal humans when they see him run.
This could of course be because he was in 'normal mode' (when he isn't using his powers), but in the next episode, Cisco says "it seems [Savitar's] appearing and reappearing all over the city at once and that's impossible. He can't be moving that fast." And those are words from somebody who works with the Flash on a daily basis.
In Season 3 Episode 9, Barry is again no match for Savitar- along with Wally
So has Savitar become slower ever since he was released or am I mistaken?