The Real Problem with Parsers

[Aiselia]

I'm suggesting that not everyone knows every classes rotations

Knowing rotations of other classes is irrelevant to seeing if someone's spamming one attack.

yes as a tank I will see smn dots, but that doesn't mean they are using painflare, dreadwyrm or deathflare, some of us have animations for other classes turned off.

Aetherflow. If they're sitting at 3 stacks all the time (or never have any at all) and aren't getting any aethertrail attunement, they're not using those skills. This doesn't require a parser. It requires basic attention.

If all you see is attack and 1 other thing in their outgoing damage

If all they're doing is auto-attack plus one ability, you don't need a parser to see that.

So how do you plan to prove any of that? That their DPS is bad, CD uses is bad, healing is bad etc. without a parser?

By the fact that they're spamming one attack. Nobody's DPS is going to be good if they're only using one attack.

Because it's my job to look at everyone else in the group's characters to make sure they're using their attacks rather than just looking at numbers in the bottom corner of my screen.

It's not your job to look at numbers in the bottom of your screen, either. In fact, you shouldn't be looking at those numbers because they shouldn't be there. Factually speaking, it is significantly less your job to be looking at numbers because they shouldn't be there.