Naturally I'm basing my opinion on Schmidt almost exclusively on his Leverkusen days. But with all due respect to the CSL, I think it's pretty irrelevant what happens there and I don't really trust the Werkself.de users you're referring to much either: Schmidt seems to be a very polarizing topic there to this day, that creates a lot of agenda driven postings.
I also once read an article that basically said: don't trust the passing stats of Dutch defensive players, because teams in Eredivisie don't really pressure them. However that was a couple of years ago, so things might have changed since then.
Other coaches Kicker named were:
Tedesco: (has to be joke, right,
@Rektsanwalt?) at Schalke he couldn't create a constructive build up sequence even if his life depended on it.
Terzic: coached half a season at Dortmund. I don't think he showed anything promising enough tactically to give him the Leipzig job. Things were quite disappointing until they lost to Frankfurt and the CL seemed all but gone, but after that I would say it was more a huge team effort (much like Kovac winning the league) rather than spectacular coaching.
I think Favre would be a pretty good coach for them, the low amount of public and title pressure at Leipzig could help him a lot, too. But he's the polar opposite of their corporate identity, so he probably won't be an option.