The pet dependancy for generation of focus are one of them, how for 3 expansions the spec had had only 50% of their talents as a reasonable choice, lack of burst damage and lack of single target damage. Almost forgot of the pretty useless mastery stats.
I’ve even created a topic to address some issues changing a lot of what the class have right now, i invite you to take a look if you will.
https://us.forums.blizzard.com/en/wow/t/suggestion-to-survival-changes/848035