I mostly agree, I don't think the majority of people actually wants Walker in there, they wanted a Republican to hold the seat; and he's what they could get. A Black Republican that could potentially get the minority vote, since that's a good part of what got Warnok in. There's always some minute chance he could win, but now he's closer to a determent now that having that seat almost doesn't matter.
I'm not saying its a lock for Warnok, but based on what I've seen and experienced as a Resident of GA during this cycle, I would be decently surprised if he didn't win.