This is simply not true, let’s not make this another Sens myth going forward when we got explanations for both situations last season.
The reason Branstrom didn’t play to start the year was an extended Covid quarantine followed by the team being across the country on the road. He was slated, and played, as soon as the team returned.
Zub, didn’t speak a lick of English, and was settling into a new country and new culture with a new language, he was given some time to learn and acclimatize before being put into the line up.
Those two guys where not benched so that other defenders could play, they played as soon as both were deemed ready to hit the line up based on their two unique situations.
As for being concerned, it’s mid summer, why not see what happens in camp before getting worked up about potential lineup issues?