This could just be me but I feel like class and talent design are being completely overshadowed by new game systems. All I've heard concern about for the last several months are Covenants and Soulbinds, Torghast etc.
Classes fundamentally are the most important aspect of the game or any MMO for that matter and in my opinion classes aren't really in a good spot right now going into Shadowlands; Yes I'm happy for the slight un-pruning of abilities but is that it? If the classes are boring to play and feels stale then what's the point of all the new systems to begin with?
Shadow Priests, Survival Hunters, Guardian and Feral Druids, Frost Death Knights, Shamans....can these classes please see some love before the launch of Shadowlands?
What about talents? Honestly for a lot of classes still talents feel mandatory to complete or fill gaps in design flaws for a specialization instead of being a compliment to the class that is an actual choice. For example Frost Death Knights best Talent will be Breath of Sindragosa for 3 expansion in a row now with no other competitive options in sight; you even added 'Hypothermic Presence to push that build even further for some reason. Another example is Demonic for Demon Hunters which is picked 99% of the time. I could on and on but you get the point.
There is just way too much focus on borrowed powers every expansion. Let's focus on the core of the game first then add in new systems to compliment the classes, not add new systems to 'fix' or fill in gaps in class design. That's why they aren't adding in a new class this expansion because they said they wanted to focus more on what we have already but quite frankly I just haven't seen that happen yet.