This may be beating a dead horse, but something occurred to me I wanted to share: It may be that LPTV's biggest problem is that the allowed power levels are too high!
That counterintuitive thought came from LPFM, where power levels are limited to 100 watts. The idea behind LPFM was to create "hyper-local" stations that serve a small geographic area, much less than an entire metroplex.
In contrast, LPTV is allowed enough power to cover, e.g., the entire D/FW metroplex from Cedar Hill. Sure, they don't reach into the boondocks like the full-power stations do, and most folks need bigger antennas; but the signals are strong enough that you can't easily have, say, a Dallas LP station and a Ft. Worth LP station on the same frequency. (You could do it if both stations cooperated and limited the signal strength radiated toward each other, but that's only likely if they're sister stations.)
This is good for programming that targets a relatively broad audience, like RTV, but bad for programming that targets local, under-served audiences as I think was intended. Interference issues and the natural desire to reach as many viewers as possible push LPTV stations to transmit from the full-power antenna farms and cover as much area as they can, leaving few or no channels available for any "hyper-local" stations that might want on the air.
The Godcasters that own KQFW ran into this problem recently. They want to transmit from Garland to reach the Hispanic Christians that live there. But the available RF channels, 24 and 26, could interfere with Home Shopping Network on 25. (To be fair, RF 47 might work if they limit the signal radiated toward Ft. Worth to avoid interference with KUVN-CA. But the point is, their choices are limited by a "low-power" station run by a large direct-to-home marketer that covers the whole D/FW metroplex.)
As I recall, I initially cheered the FCC's decision to raise the allowed VHF LP power from 300 watts to 3000 watts. But perhaps they need to be moving the other direction instead. Perhaps they (or Congress) should require LPTV stations to either upgrade to Class A, or limit the population their signals cover to allow for more locally-targeted programming. That way stations like K25FW or K31GL could go the class A route, while other LP stations narrowed their coverage to reach only their intended audience (downtown, a suburb like Garland, or wherever).