There is a similar post in general discussion but I thought it would be more fitting here.
With most currency being transferrable soon with warbands in 11.0, I think we should be able to transfer crests to alts once the “dreaming of…” equivalent achievement is acquired in 10.2.7.
The achievements already allows us to trade up crest tier, I think it’s not a far ask to make it transferrable to alts.
Yes keep gear progression character specific. But my 200+ aspect crest is collecting dust on my main from getting KSH while my alt could use a myth level crafted gear.