You said it's a slow bounce back so transition is doing its job, but it's your base tune that's over shooting too much and transition is slowing it. You could try moving it down to .2, and that will help some - maybe even enough, but we should fix what is at the root of the overshoot.
It's worth noting in newer versions they have lowered transition to 1 at defaults ... that is your stick acceleration when you start to move the sticks .... where you have that at 2 is super twitchy ( shows every tiny movement on your sticks). You can lower that to smooth things out but that won't help your bounce back - it's unrelated. That's all personal preference - I'm just mentioning it since you said you haven't used the sliders.
2 things can cause bounceback in your tune.... (this is what you want to know). Either just D is too low, or both P and D are too low. Start by raising D to 5 points higher than P. Also drop transition to .2. Then report.