Based on what though? Playing 30 minutes a night in all areas and high pressure situations in junior did wonders for Hronek and Cholowski's development.
Also look in Toronto. Liljegren was drafted a year before and higher than Rasmus Sandin. He came over and played extremely sheltered AHL minutes in year one which didn't help his development. Sandin did a year in junior first. Sandin is about to make their team, Liljegren isn't. Just wanted to give another recent example.
It's time we stop pretending the OHL is some scrub league
Seider is much better now than Cholowski/ Hronek were at that time, Seider is good enough now to develop his game at the AHL level, and he will get plenty of minutes to do so.
Liljegren just isn't that good, was highly touted in his d-1 season, but stagnated/regressed before he was drafted. Seider is already a better/smarter player. Sandin jumped to the AHL at 18 as a 29th pick, and I'm sure playing his draft year in the OHL was good for him, but it's not some necessity to play well in the AHL.