A first video of the Red Paddle 9'2" Surfstar performing well in mushy waves.

The stiff board (25psi and two lateral battens) make the board pounding like a hard SUP on the water while riding down the wave.
A bit higher rocker would help - now you need to take your surf stand quickly. On the other hand a flatter scoop is beneficial for paddling out.
Turning on the pin-tail seems going fine.

In small mushy wave most boards don't perform great.
The other surfers hardly get on their boards and even then they don't get speedy.
The conditions were minimal but he had fun on his inflatable board - that's what it's all about.

We'll see once we get one here
This model is the stiffest on the market at 25PSI and 2 lateral (sail)battens.