Why trade Bozak especially if you got cap room? Nylander hasn't proved himself at centre, and if ever there was an injury to Matthews or Kadri, leaves would be very weak centre. Holden and Miller aren't that good get excited about.
If the Leafs are in a playoff hunt, we would the Leafs want to trade JVR? To make the team weaker?

I'm gonna say this a million times more. The Leafs have already shot down a Holden-Bozak trade because they were completely uninterested in Holden and the Rangers don't seem willing to pay more.

The Bozak trade weakens the Leafs at center too much though they can use the 2nd rounder to find a replacement. Vegas doesn't need nor they would want to take on cash, the pick doesn't make it worth Miller IMO.

The idiot in NY that put that rumor out there that Toronto would want Holden is so unfounded. Why would the Leafs want a bottom pairing left handed defenseman?

Bozak is not going anywhere this year, if any of JVR/Komarov/Bozak is traded he will be the last one to go as C is the hardest to replace....not long ago Bozak was our 1rst line C cause there were no other options, people forget so quick.
Why the need to make trades just for the sake of making trades...forward group as it is gives many options and potent group. The prospect pool of D is actually better than ever, need a season or two to come up, or maybe not and this year someone comes up mid season already (Rosen/Borgan).
Leafs could keep all JVR/Bozak/Komarov for a nice playoff run and lose them all next summer; JVR will be replaced by Leivo/Johnson/Kapanen/Rychel, Komarov can be replaced by Hyman, the hardest to replace is Bozak...maybe Nylander C next year with Marleau to help on faceoffs.
Only one of the three will probably be resigned, JVR most likely gone due to cap, all depends on asking price from Bozak/Komarov to determine who stays IMO

BTW I would place Brown on the 2nd line of your roster, Hyman on 3rd line and Kapanen on 4th line to start...Brown already shown can score, you put Kapanen there and the preasure to perform is so high, not every rookie is like Mathews/Marner/Nylander, let the kid get confidence and go step by step.