Drop the DPS on FOTP, Geo Sol, QGJ, Leia, IG-86 to be appropriate to their speed and survivability (namely HP), and you won't see any issue with Poe. Poe is not the problem, honestly. It's the fact that all the huge-hitting culprits happen to also have high-spectrum speed and solid survivability as well. Poe is simply the mechanism behind which these characters are getting to mass assault first.
If Phasma (or any other unit with a turn-order manipulation, be it positive for their team or negative for the enemy team) had Poe's speed, everyone calling for Poe to be nerfed would likely just be calling for Phasma to be nerfed. Any way, my point is that even without Poe, the same culprits responsible for the meta PvP crisis right now (the actual OHKO on full-health maxed out tanks like Fives and Obi-Wan) are still the real issue, and will continue to be until they're balanced.
You want an example of what's intended to be a "glass-cannon"? Look at Cad Bane's and IG-88's stats. Those are what the game intends to be considered a glass cannon.