More spells than are currently offered (at least more than the new ones in the spellfile), more thought put into quests (long, barely rewarding quests that have you grind x mob for y drop for hours are not fun, at all), a reason to gain faction beyond some incredibly outdated armor, a gate neck, or an underpowered augment.
The faction and quest issues can be rolled into one I suppose, but SoD has a lack of quests, nevermind ones that are actually fun. If Ikisith had some version of WoWs
Shattered Sun Offensive and
the Battle for Sun's Reach I would be a really happy camper. (WoW actually did faction grinding and rewards right)
Mainly though, I'd just like to see some awesome single group zones with scripted content.
I'm going to echo this along with a few extras.
For example quests that don't have you go to zone y to kill some incredibly undertiered mob that do not also require a literal ton of random stranger coercement. That would be nice. Quests that are intended to be done with at most a group, sod was supposed to go more to a dungeon crawl kind of feel with 18 man raiding, but I've yet to really see any of that emphasis on quests.
I'd rather not have to get a raid together to get a quest piece, I'm sure just about everyone else on the server feels the same. Those quests that one does have to put a raid together for are fairly undone by the majority of the server, those that you can complete on your own with 10x the time put in generally tend to be done once they are known about.
Honestly the beginnings of the vah quest were more around what I'd like to see, before the oh go kill this raid mob, then this one, then this one, oh and then this one kind of thing. More like the main quest actually. Also an addition to the main quest would be good.
Interesting spells would be preferred. Things like what monster summoning did for mages for example. Not only did it provide a dps boost for groups, soloing, etc, but it also provided that extra bit of a boost at the raiding end (though with the emphasis on ae's on every single goddamn high end encounter it's pretty much null as for bosses). But more importantly it added a bunch of extra uses. Pulling for example at a distance, and since there are two stand up versions of it, emergency tanks. I'd like to see spells follow along those lines really. Not just more powerful nukes, and certainly not in a raid for pieces of these spells for an eternity manner.
I'd also like to see a bit more in the way of straightforward fun encounters. Not do this this this this this this this this this this this and this also this and this then you might have a chance at killing this boss.
Sod was the most fun, when you only had one or two tricks to worry about per mob, or per area. Challenge is fine, but I'd like to see more straight up brawls with a trick or two. Not oh you must kite these, charm this, fight this, heal through the ever present ae, then kill it again.
Sod is not lacking in raid and high end content. It is lacking at the midlevel, and also at the lower end 65 area.