Random thought: we spend so long gathering ethereal coins for our mains (couple of hours an evening, really) that the thought of then repeating for alts is not at all appealing...which for an 'alt-friendly' expac is a bit disappointing. How about - as a member / all access bonus - making ethereal coins account-wide? Or flagging ethereal purchases across the account, like is currently the case for adorns? [spent too much time doing all the necessary zones to get maximum ethereal coins for my 'main' to check this idea/suggestion hasn't already been made...]
