Which are you? Someone who doesn’t have a lot of time to play, or someone who has nothing but time to play and hates being timegated? I didn’t think there were actually people who’d argue contradicting viewpoints at the same time, but here we are.
Anyway, these are just cosmetics. Any compulsion to ‘collect them all’ is the problem, not the methods of acquisition.
Or you’ll come back after it’s over and complain that you didn’t collect them all. Which is probably fine since you probably shouldn’t get all of them unless you play all 8 weeks.
Most of them are bad anyways though there’s like maybe a handful worth collecting anyways and well if you think differently then you can collect them all. You just will need to put forth maximum effort.
Meanwhile I’ll snag paladin Druid maybe mage and be done probably in a week or two and anything else is just gravy at that point. You can probably even argue the Druid one is a waste as well since you won’t even see it most of the time.