The only two major changes I would make right now:

1) Give the marks more HP in general and scale it up as needed in real-time.
2) Give the marks an 'announce' option. Doing this would send out a map-wide shout with the coordinates and 'claim' the mark, giving the announcer full credit when the mark is killed regardless of resets or whatever without needing to trigger the aggro before anyone else arrives. Everyone else would still get credit according to their contribution.

Rewards should stay as is. I decided to pretty much steer clear of dungeons and instances as it stands, and that pretty much meant an end to getting anything of interest in this game in its prior form (No idea why I did ATMA with the myth barrier that comes after). So it's nice to actually be able to get tomestones at a good rate elsewhere now. Sands and Oils will be a bonus (after I get my Succubus), and I'm honestly glad to see stuff like that lose its exclusivity. If anything, give more options to acquire them. :-3