I think that if we gave Chytil 4.5Mx6 we'd just be complaining in the opposite direction (it's what we do here...). Maybe I'm wrong, but I think most people would be saying it was premature to give him that kind of money. He wasn't going to sign 6x2.75 or something insanely low like that, so the only way we'd have locked him up would have been by paying for future production that may or may not manifest.
Dvorak, in his first 176 games had 32 goals, 77 points, 180 hits, 111 blocks, was 49.6% on draws and averaged around 16 minutes per night. He also did this over 2 full seasons plus 20 games (injury).
Chytil right now, through 186 games has 34 goals, 71 points, 60 hits, 72 blocks, is 38.9% on draws and averages 13:59 per game. This has been through parts of 4 seasons for Chytil.
Dvorak had had 33 and 37 points his first two seasons, straight out of the gate, and then only played 20 games due to injury. He was also a much more complete player, playing on a very low scoring team. Chytil finally paced to surpass 30 points last season but has yet to establish himself as a center and doesn't contribute all over the ice the way Dvorak did/does. Personally, I think if we got him locked up at 4.5M long term and he put up a 35 point season next year, people would be crucifying the contract. I don't think management is comfortable making that kind of commitment to Chytil yet. If he continues his trajectory from last season, we can begin negotiating a new extension while he still has a year left on the bridge. If he stagnates or doesn't breakout as hoped, it's probably better to have the smaller AAV.