My full dollar:
1) Them referring to themselves as TKR sort of ruined the illusion, it was irritating, and against the original.
2) TKR would have been a great program, if they didn't have the Knight Rider name. Having multiple talking cars and a general reflection back to the series is not Knight Rider, it is on par with what KR2010 did (but not as insulting to the original fan base) If they had just focused on the story, the action, and not tried to shove it down Knight Rider fan's throats with the name, I think a whole lot more fans would have flocked to it anyway.
3) The time slots sucked pretty much across the country.
4) There was too much concentration on the humans, they threw in the cute moments with the cars to remind you that the cars were still there.
In summarization, and upon final reflection, TKR would have been neat, if they deserted the Knight Rider idea, and made it its own entity. Yeah, we would have been comparing it to Knight Rider, but it might have had a bit more of a fighting chance.