No harm no foul, at least as far as I'm concerned. Obviously stirred the bees nest a bit here... lots of passionate angers and conservationists out there, and kudos to you all.
Certainly the put-and-take lakes that are heavily stocked suffer not by keeping a 4 trout limit. I certainly wish our DNR were more supportive of the warm-water fisheries, and fishes. Seems like they are left to their own for the most part. That is where our stewardship of the resource can have a bigger impact for sure. It's sad to see the bass-regs change, but nice to see the Wiper limits change.
Depends on the species and location too. Walleye are fewer and farther between, while channel cats can be pretty prolific. (or maybe that's just me, that I don't know how to find the walleye!

)
Panfish are panfish. They might have ups and downs seasonally, but in general, are prolific, and can accept a fair amount of harvest. (plus can be mighty tasty in a fish-taco, or deep fry!)
I can't recall relative size, but just know we caught grundles of bass and bluegills back in the days of Michigan summer camps. Plus big perch out of Lake Michigan off the breakwaters, and suckers and cats out of the Illinois river. Good times, good tugs. Had I only known about Salmon fishing on the great lakes! Missed opportunities!
Definitely - farther south, longer growing season, bigger fish. It's a simple equation. So - yeah Bama, got any extra beds out there? Or maybe we could camp in the backyard, and just suffer the humidity! That's what the lakes are good for right! Diving IN!