Question for those who didn't pick up AST til 5.0 or after.

[ItMe]

Yes, you do. At least to an extent. The whole point of offering feedback is veteran players have the perspective to make comparisons. Long time Astros can reference what the job used to be like; why they enjoyed it and how current decisions have hurt or completely ruined the enjoyment they once had. If you're only just starting out on the job, or didn't invest much time into it. You can still offer your thoughts on why you disliked it, but your opinion shouldn't be weighed as heavily.

I'm sorry but i believe no player has a larger say in "what's fun" than another.
We're just gonna have to agree to disagree.
If you really wanna have that discussion, I'd argue that having a history with the job, if anything, might blind you somewhat to what it's really like now, as your baggage can prevent you from seeing it AS IS as opposed to someone who sees this version of the job without the past coloring their perspective. They've still had a whole expac of time with the job and if that's not enough then nothing can be.

Frankly, this has been one of the major issues of Shadowbringer's job design, in my opinion. The dev team prioritized accessibility and attracting new players to each job instead of focusing what made the job enjoyable to its current playerbase. Such is why we've seen such enormous backlash towards healers since launch, and why a job like Bard went from arguably the most popular DPS to the second least.

Additionally you might just be shouting into the wind as far as SQEX is concerned. They don't care who is a vet of what job either, they're a business. If they design B will ultimately please more customers han design A... they're going with design B.
Not that this is right... but to expect different is to court disappointment.