Regarding Tymkin and his performance this season: If you look back at his body of work, he initially got his spot on the roster as a throwback enforcer type. A player who stuck up for teamates, and a willingness to drop the mitts when needed...and at times when it wasn't really needed. He established a reputation as a player not to be messed with, and the coaching staff recognized this.
He was then tasked with cutting down on the needless penalties, and his role was re-defined as being the guy in front
of the net during power plays, to screen the goaltender, take the abuse without retalliation, and pot a few garbage type goals. He did that with some measure of success, and he began contributing goals. This season, his role was assigned to Regula, who became the player in fromt of the net, during power plays, and Tymkin's purpose did not appear to be clearly defined, so he plays as such...with NO defined role.
It's the coaching staff's responsibility to get the most out of the players they have. A good staff does so by giving assignments that play to any given players' strengths. Tymkin has proven to be a player who will take direction, will adapt to what is asked of him, and will be responsible for shaving back penalty minutes when so directed.
Players just don't regress on their own, They do so when allowed to, without correction or direction.
Anyone is free to disagree,