With competent coaching, the Lions have the talent to be a perennial playoff team. I didn't think the Lions sucked from a talent perspective last year; I thought they suffered from poor coaching and poor discipline.
I was very honest last year and repeatedly stated that the Colts just happened to be near the top of the large tier of mediocre teams in the NFL last year and were helped by a last place schedule. They're going to regress this year because 1) they're playing a much harder schedule 2) at least at this point, the offensive line doesn't appear to have been sufficiently patched over the offseason. Irsay can keep tweeting his "demands" about getting better on the offensive line, but until they address the issue (whether it is coaching, scheme, or players, I'm not sure), nothing will happen.
The defense has been shockingly bad. Last week, everyone in the world knew EXACTLY what Oakland would do and yet, Pryor ran roughshod over our defense. This week, Tannehill was hitting Wallace and others at will. Manusky is not the answer and was horrible with the Chargers before the Colts hired him.