There`s little doubt an addition of a Tarasenko would be a boom HOWEVER, all is driven by the C position for the most part, the acquistion alone of a Tarasenko, IMO, does not benefit the B`s nearly as much as getting a bonafide C-man to finally solidify and stabilize a terribly concerning black hole this team has right now. Schenn isn`t a guy who needs to be the focus offensively, he`d slide seemlessly into a 3rd line C, still get his minutes.
I could see a guy like him, with a player like Heinen causing real issues for opponents.
I think you may be overstating the impact a center can have by himself. Look at Krejci. He's a damn good two-way center. With two good wingers he looked like a 100 point guy. Take away those quality wingers and he's a -7 with 1 point in 5 games, and that 1 point wasn't even a pass, he just fell down and Marchand picked up the loose puck.
Also, if the B's get Schenn, I think it will be to play wing, not center. Why? Well, he's going to be really expensive to acquire and I'm of the belief that one of their acquisitions (3C or Top6W) will have to be "cheap" because they're not going to give up multiple 1st's or A prospects in two separate deals and bankrupt the future, and IMHO, it's going to be much easier to find a "deal" on a 3c than on a player who is a legitimate top6 scorer.
Last, and maybe this is a little unfair of me, but I find it hard to imagine them putting a player of Schenn’s caliber on the third line when they behave as if that would be beneath even a Jake DeBrusk.