But there really isn’t any other good argument.
Restricting the covenants doesn’t add player agency, it removes a great potential for it. It doesn’t make for meaningful choices - it removes the possibility of them throughout an expansion by providing one choice which statistically is going to be more punishing than beneficial. It doesn’t take away any"RP" value, because the RP players could still make their rp choices the way they do today.
You say that it’s damaging - but the system won’t change. And I bet you’ll still keep paying blizzard when it rolls out.