I'll also leave this here from the other thread based on the fact that questing will not be the ONLY way to XP.

If they are talking about implementing XP chains then yes that should be the general idea. Players would be able to:

a) get a light/full party together and run an instance, behest or find a mob grinding camp to get XP. The incentive to do this is that the faster you kill, the more XP bonus you get.

b) solo leves for XP or do them in a party to complete them faster. Remember Yoshida said REDUCTION of bonus not REMOVAL. The XP will not be as great as before but I doubt it will be so drastically reduced that leves will never be worth your time.

c) pickup sidequests or (hopefully daily/repeatable) quests at frontier hubs for XP. They may also optimize some for party play.