I never even noticed they changed voice actors tbh, though this definitely does not sound like the Velma in my mind. I thought Velma had been completely written out of the series in the Scrappy era but it looks like there was some crossover.
The Scooby wiki is great btw:
"[Velma] has above-average grip and core strength, as in a sea episode she was able to dangle on a very wide pipe (bigger objects are more difficult to grip than smaller diameter bars) and hold her legs out straight in front of her (90 degree bend in hips) to avoid hitting a monster as it ran past her through a doorway.
Velma is also incredibly strong in her shoulder overhead pressing muscles (trapezius, deltoids). She was able to simultaneously life two female wrestlers (who tend to be heavier than normal women due to the extra muscle) and throw them through the air above her head level, one per hand. She claimed the move was called the "Flying Dinkley".[8]"