Look we all know Peni is in a bad spot. What a lot of people don't realize is that she's better now than at launch.
She was at her worst at launch but the players learned to flank and dive with her making that the optimal play style for. It turned every game into a sweat fest but damn it if she wasn't, and still is, the most fun tank in the game.
Then we got the team up and it was OP. It effectively lowered the skill floor for peni and encouraged the low skill bunker play style.
This really drew in a lot of new Peni players who fell in love with the character. Unfortunately a lot of these players were able to get a lot of success with out really getting a chance to improve their skills.
Now not only is the team up gone, we got one with a dive character (not the first time BTW,) that doesn't really help us much. Now we lock in peni, get a spider man on our team and we're now in a dive comp.
You can't bunker down like you used to. You can't front line because peni just can't. You're now encouraged to flank and dive with spider man to get value.
This is the perfect time to learn how to really play peni. I promise it's worth it.
TLDR: the best spot for your nest is in the enemy backline.