I believe I read here that the Texans went more to a gap scheme the last two games in the playoffs. And they looked/ performed a little better.
Popovich did play LG in college, so he has that experience. He's been coaching for 14 years and 8 of those were with an OL title.
Hopefully, if interviewed by Caley, he'll show his knowlege of both zone and gap schemes and has his own ideas of what's wrong and how to address the issues. Hopefully he's ready to take the next step in his career and is a capable OL coach.
But then again, Caley still may make a change. If so, I think this will come soon, this week or next.