I am not moving Wally unless it is absolutely necessary to SUBSTANTIALLY upgrade the team elsewhere. He is young, cheap and slots in quite easily on the third line alongside JGP and (presumably) Parise.
His development hasn't been linear, however, excluding short-timers on the roster, I believe he was fifth in Corsi EV and he isn't afraid to drop the gloves and stand up for a teammate or himself.
The Isles need more of that, not less.
I look at Wally's growth like Romanov's. Lots of people hated the Romanov deal, held it against the player and wanted to run him out of town. Now that he is getting comfortable, learning and growing, you see the player he can become.
Wally is a decent top-9 player now, with the potential for more as long as he is willing to learn and keeps working. To me, he feels like the anti-Beauvillier, who played soft, lacked confidence and is your archetype West player.
And, again, Wally is young and still inexpensive contractually. No need to move him unless it is part of a big return or other move.