Roster

Okay, maybe.
But the line combos are all over the place.

Nichushkin - Mackinnon - Rantanen
Drouin - Johansen (or Wennberg) - Tatar
Wood - Colton - O' Connor
Cogliano - Olofsson - Kiviranta but you bought him out, so maybe call Pavel up to 4C and move Olofsson to RW.

Is Wennberg an upgrade over RyJo or Colton?

The benefit to adding a 3C is the Avs could move Colton to wing. When he was in Tampa, he was always better on the wing than at center. Bednar has mentioned that he would like to move Colton into the top 6, but the team is devoid of centers.

Personally I'd say Sissons would be a great target for a bottom 6 C, can play up, down, on the wing as well, physical without being O.T.T., wins face offs, can score, PK, and on a reasonable deal and term and fits with the core in age.

sure sure. i like wennberg and i like this idea.