Why should there be a district between Toledo and Cleveland? And why should you divide the eastern and southeastern suburbs of Cleveland between an Akron-based district and Youngstown-based district? And why should Cleveland be divided?
My thoughts aren't terribly different from muon's and his Ohio map. I've also drawn the state several times and I really liked the map I came up with about two and a half years ago:
I originally had a Toledo-based district similar to muon's, but I instead drew Toledo in with the remainder of the lake-shore. As you can see, I did not split Cleveland and see no reason why it should be split. Functionally, OH-10 is the district between the Cleveland one and the Toledo one that Democrats would most likely hold in all but the most disastrous of years. It's similar to Kucinich's old OH-10, but less safe by moving entirely out of Cleveland. I think it's a perfectly logical fit to combine Cleveland's western/southwestern suburbs with Lorain County.
Districts 6, 13, 14 and 16 are almost identical to muon's competitive map above (and I honestly had my map drawn before I had seen his). I don't see any problems with any of those districts.
I think my map would be something like this (with OH-03 probably more competitive on paper):
Safe D: 9, 11, 15
Lean/Likely D: 10, 13, 16
Toss-Up: 1, 6, 14
Lean/Likely R: 3
Safe R: 2, 4, 5, 7, 8, 12
I was a bit cautious on the lean/likely Democratic districts, but they're probably much safer than they appear. So, in a neutral year, I think both parties would start off quite safe with six districts each, leaving three or four highly competitive districts. Either party could reasonably win up to 10 seats, but I think an even split or a 9-7 split in either direction would be most probable in a relatively neutral year.