No one here wants to make Powershielding like it was in Melee.
The very first post of the Code Agenda thread already states that.
It also states that, yes, we do want PSing to be easier for projectiles in comparison to melee attacks.
We just want Powershielding to actually have a risk. As of now, there is none. Most of the time in Brawl, if you try to Powershield, you WILL Powershield. It's just that easy.
There needs to be risk involved. You choose to Powershield at the risk that you might mess up your timing and get hit instead.
You have a reason to choose the regular shield over the Powershield if we nerf the Powershield. Once we get ShieldStun, there will be no reason to shield over Powershield otherwise.
Melee's timing was impossible, yes. We don't want that. We just want Brawl's timing made a little bit harder, allowing consistent Powershielding to be considered an actual skill, not just a common fluke.
As long as easy Powershielding stays in, the game will always be extremely defensive. Its ease and power can overcome most approaches, and that's a large part of what makes Brawl so campy.