Yes they will. But i don't think it is bad design. It is just choice. Being locked into one ability the complete addon is just a shitty feeling when you want to do something else or realize in a random BG that the Mage on the other them can silence you forever because he chose another covenant. And no that is not a "tryhard" problem. Everyone will notice stuff like this unless you play all by yourself forever. I welcome choice in the game. For me they could even make the covenants non switchable. As long as there is no real power behind it but only cosmetics or open world stuff.
But we are talking in circles. Just let it be what it is. You won't agree with anyone here and i won't agree with you. We both think the other is wrong. Nothing will change that at this point.