You keep saying perceived....it's not perceived, it is in fact inconsistent
The DoPS is judging things that are inherently qualitative. Elbowing someone in the head is a penalty in the rules in all circumstances, but is only elevated to a suspension by qualitative considerations such as degree of violence and intent. Given that degree of violence and intent are not quantitative assessments, it is completely normal for different people to come to different views, and order incidents differently according to these criteria. The concept of inconsistency can't really be applied to something like this. Think of it like this:
Incident A and Incident B happen in the same week. We can group people into three groups based on whether they think A is worse than B, B is worse than A, or that the two incidents were exactly the same in terms of the qualitative criteria that factors into supplemental discipline. If Incident A received a 2 game suspension, what decision can the DoPS make that will
not be seen as "inconsistent" by two out of the three groups?
This is simply the nature of the rules in the NHL. If they make any elbow to the head, whether a love tap or attempted murder, a flat X-game suspension, that is a far worse and far less fair system. I just want people to think about whether the nature of this type of criticism is fair.
I do not always come to the same conclusion on my own about DoPS rulings, but I do think that their approach to their job right now is exactly what it is meant to be. That we have different opinions on qualitative assessments is neither surprising nor meaningful in the long run.