Vegas cup winning team's top 9 was not massive. Stone is 6'3, Eichel is 6'2, and Roy (3C/W) is 6'4, but top 9 forwards Karlsson, Stephenson, Barbashev, Kessel and Marchessault are all 6'0 or less, and Smith is 6'1. Their fourth line and D are also very big: Pietro/McNabb/Hague (6'4+) and Theodore/Hutton/WhiteCloud/Howden/Colesar/Carrier (6'2).
The blues forwards, despite well-developed elbows, were actually smaller than a Marchment/Cherny inclusive forward core. Only three forwards over 6'1 (6'3 Maroon, Sundqvist, Sanford) and those three spent a decent chunk of time on the fourth line. Their top three scorers- Oreilly, Taransenko, and Schenn were 6'1, while Perron (6'0), Bozak (6'1), Schwarts (5'10), and Thomas (6'0) were the depth scorers. Now, Parayko (6'6), Pietro (6'4), Jaybouw (6'4), Edmudsson (6'5), Bortuzzo (6'4), and Gunnarsson (6'2) are absolutely massive. Yes, we'd need to add an awful lot of size to the defense, but only the two guys we are keeping are 6'4 and 6'3 anyway.
I'm all for adding size and grit (and lots of it- starting with Marchment and hopefully Ekblad/Gavrikov this summer!), but we need talent even more than we need size. You can add size later. Now, big, skilled size guys are difficult to add, but a guy like Marchment is world's easier to get than a guy like Marner. Also, I think the odds our final cornerstone we draft is Belchetz/Roobroeck/Verhoeff (all 6'4) is pretty high. McKenna, Stenberg are also expected top 5 threats, though I imagine Grier passes on Stenberg.
@Hodge I don't particularly want to give up Eklund for him, but Cernak would be a dream addition to the roster (Tampa will take their next two runs with him), but after that maybe they're rebuilding and would move him for a playoff team 1st and a good prospect).