1. Way too much to give up for Yakupov. Even if Ottawa is about to lose Puempel to waivers, Ottawa has zero use for Yakupov.
2. Seriously doubt Colorado entertains an offer like this for Landeskog, they could get more. Also, even if they do it, Ottawa is getting great production from Hoffman already. Why take this risk and give up Ottawa's only serious top-4 defensive prospect.
3. I'm not even going to bother addressing the value, but the trade makes no sense for other reasons. Ottawa needs a bottom pairing LHD to play with Wideman, not a top-4 RHD. Who is Stone going to replace? Ceci? How much of an upgrade is that? With this trade Ottawa will end up playing either Ceci or Stone on the bottom pairing, Wideman in the pressbox, and having no one to play beside Ceci/Stone now that you've traded Boro.