Conner can't/won't play more until he demonstrates he can pass protect.
Do people really think that players are missing assignments or reads because they are thinking about celebration moves? If that was the case, then no one could ever be good at NFL football. Things that are on every person's mind:
1. Is my significant other mad at me?
2. Are my kids doing okay?
3. Did I pay the cable bill?
4. Wonder if my folks are going to be able to visit for the holidays?
5. Is that mole cancer?
I mean I can go on and on. Everyone is distracted all the time.
As for the penalties, it is kinda surprising that everyone thinks this team is penalty prone. Here is the data --
http://www.nflpenalties.com/?year=2017
3 more penalties for less yards have been called on the Steelers than the Pats this year. What a total lack of discipline. For those that notice that NE has run 100 more plays than Pittsburgh it is still 4% to 3.6 % - again what a totally undisciplined team.
Perception is not always reality.
There is only one issue holding the 2017 Pittsburgh Steelers back -- their terrible 3rd down conversion rate on offense. Fix that and everything else doesn't matter. Don't fix that, and who cares about the rest because this team won't win shit in December and January.