I'm in coastal NC right now, having lots of fun catching all the brackish killies that we don't get in TN. Of course the Tennessee River tributaries in western NC have similar fish to east TN, but the rest of the state has a very different fauna from what I'm used to.
With regards to TN rules, it's a little more complicated than that. It really was never legal to collect native fish for the aquarium, but a loophole was left open for keeping "bait" in a fancy rectangular glass bait bucket. The new law restricts which bait species can be taken away from the water in which they are caught, a sensible restriction already in place in many states that helps prevent disease transmission and bait-bucket introductions. The new rule is imperfect and inconvenient, but the old-style attitude of "they're just minners, do whatever you want with them" was unsustainable in a state that has nearly 100 threatened, endangered, or in-need-of-management species (many states don't have that many freshwater fish species in total).
I have hopes that we native fish hobbyists in Tennessee can successfully lobby for a fish-keeping exemption that will allow us to enjoy native fishes at home once again. The new rule is not aimed at us; we're hardly on the fish and game agencies' radar. [/digression]