Of course we will get xp and gains from the new activities, just kind of funny that they pressed us hard to finish the current ones where the xp only went to gear which will be made useless. I personally hope they adopt this from now on as their leveling system. Gear deciding leveling system was flawed and made it easy to use 3 identical characters as a way to get gear to share amongst each other easier. With xp only leveling at least to keep up the same pattern would mean you at least have to grind all 3 characters more.