"Wayne State: Worth it?" Probably not.
pretty big assumption that there is a "boom" coming anytime soon...
You may be right, and it may be that folks entering law school now will skip over the ones who graduated earlier and will have career paths that will justify their large debt loads. But it's not a gamble I'd want to take.
To answer the question at the end of your post, almost all Wayne students are Michigan residents, so their transfer destination of choice is UM. In a typical year, after the 1L grades come out, about 3-5 will transfer. You need about a 3.7 to be confident of a transfer (that's top 5% or so) but I've heard of kids with a 3.5 getting in (and that's more like top 10%). People don't typically look at Ohio State or Notre Dame.