It doesn't really matter what others have done in the past, each situation is it's own and it can be hard to compare them. There's no telling what Suzuki will be in the NHL until we see him there, no sense bickering over who did what. If you watch the games, what's most impressive to me is what Suzuki is doing in all those elimination games.
Against London in the first 4 games he had 5 pts but in the final 3 elimination games he had 8 pts.
Against Saginaw in the first 4 games he had 5 pts again but in the final 3 elimination games he had 6 pts.
On top of that he's been very consistent, in 22 games he's got points in 19 of them and since game 2 vs London he's had points in 15 of the last 16 games.
If you look at say Marner/Tkachuk they also had Dvorak as between the 3 they had 119 pts in 18 games (Marner 44, Tkachuk 40, Dvorak 35) Suzuki has Ratcliffe and Entwistle and they have 86 pts between them (Suzuki 38, Ratcliffe 25, Entwistle 19) so he's getting less help then the London top line had as he's 13 pts ahead of the next highest scorer on his team so other teams are going to focus on him much more. He's taken a beating for sure but seems to bounce right back up each time despite back to back 7 game series and then taking on a team that went 3 rounds in the playoffs without losing a single game.
So if Suzuki ends up not being as good as Marner or Tkachuk or DeBrincat who seems like a better comparable since they have the same points at the same age (both were in their age 19 season). DeBrincat had Strome and Raddysh, they had 103 pts (DeBrincat 38, Strome 34, Raddysh 31) in 22 games then so be it. As long as he helps the Habs win games I'm sure Hab fans will be happy with the trade.