You picked a great tire. But I agree with most of the guys that 200 miles of slab commuting a day is going to kill those Pilot Powers. They're a good street tire. But not a commuter. I think that much slab is going to kill them. Q2's that I run are about the same category of tire. And I only get about 3500 miles of hard canyon riding and maybe a handful, maybe 200-300 miles of that is slab commuting out of them. I only ride to work once or twice a month at most. I used a set of Q2's that were close to done on the edges after about 3000 miles of canyons on a 1500 mile ride last summer. By the time I got home, the centers were completely flat. Have fun on the PP3's while you have them, but don't be surprised when after a month of that kind of slabbing nets you a 3" wide flat ring around the middle of the tire. For your kind of riding a true sport touring tire is what you really need. Tires like these would be a good option.
Dunlop Roadsmart II
Pirelli Angel GT
Michelin Pilot Road 2
Bridgestone Bt023
I used the 023's for a while when I was commuting every day about 3 years ago. Great for touring and commuting. Was getting a ton of miles on them. But I had some issues when I would ride aggressively in the canyons. They're not made for that but it doesn't sound like you really ever do that type of riding so you should be fine.
One thing to keep in mind is that OEM spec tires like the BT021's that you got and I got on my bike are different than the 021's that you'd get if you bought them aftermarket. Much harder compounds, and just cheaper all around.