I hope they give something that end sup being useful as every other game I tested or bought the Special Edition and so on you got things that were only useful for a few days or weeks at most then never looked at them again and they took up space in the bank or on a mule.
Potions of XP boost are great for people that grind for the period the potions last and then it's gone and nothing to show again.
How about an item or two that grows with you that gives a little better than what can be made or found that also can be tuned to the Class you choose, could be an NPC you see to change the items ?
Something that we have for the life of the game that shows we were or are VIPs.
Maybe a special mount no one else can get with extra storage ?
There are many things that could be done but please make it a lasting gift
Cheers