The problem I have with Weakauras going away is that not every important proc is actually tracked by the built in popup notices, nor do they provide a way to see the timer left on the procs.
So unless Blizzard actually adds that proper functionality in so I can see how long is left on my predatory swiftness or tiger’s fury, playing feral is going to suck going into Midnight.
“Git gud noob!” Sorry but trying to pick out a small buff icon among two dozen other buff icons in the corner of the screen is not a skill issue. That’s a UI issue. Weakauras allowed you to track these important procs (and their actual durations) in a customizable way so you’d actually get the information that you needed when you needed it.