He never played in the CHL, but I'm fairly certain he would have done quite well there (not as good as MacKinnon because he's not a MacKinnon-level player). He was playing in a men's league as a 16/17 year old. He was one of the youngest (was he THE youngest?) players in AHL history, and put up 31 points in 46 games (.67 ppg) as an 18 year old. As a 20 year old, in his brief stint in the AHL, he was a PPG (Quinton Byfield, as a comparison, played in the AHL as an 18 year old this past season. He put up 20 points in 32 games played for a .63 ppg).
For most of the last three years, Chytil's been developing at the NHL level in limited minutes. Since he's only getting limited minutes, it's important to look at progression. Over the last three seasons, he's gone from .31 ppg to .38 ppg to .52 ppg. In that span, he's never averaged over 15 minutes per game, had scant time on the PP, and particularly this past season, all of his production was even strength. Over the last three seasons, his +/- has gone from -22 to -7 to +9. His face-off percentage increased by about 5% this past season as well.
Basically, in very limited opportunities, he's been showing regular and sizable progression in each of the last three years. Had he been playing in the CHL as a 16-20 year old, it's likely he would have dominated. Had he been left in the AHL to develop, he'd almost certainly be well over a ppg player down there based on his previous stints as a child. In other words, if he were still "new"--left to tear apart lesser leagues rather than developing with the main team--I honestly think we'd be talking about him the way people talk about guys like Zegras. There's no indication that he's going to stop developing (3 years of consistent growth, and most NHL players don't peak at 21--most have barely started to ascend. Sorry Del Zotto).
There are fancy stats that show all of this in the game data as well, and I think it's also verified by the eye test. He was using his teammates much more effectively this season. Before this year, he'd look to shoot as his first, second, and third option. This season was the first one where he had significantly more assists than goals, and the vast majority (it may be all of them--I don't recall off the top of my head) of those assists were primary.
That, in a nutshell is why a lot of us are expecting more from Chytil and see him as more than just a 3rd line center.
Edited to add--it's also important to remember just how young Chytil still is. He's all of three months older that Kravtsov.