Anywho, please read all of it if you can as I do put a couple ideas seperated, and then merge them into another idea... you'll see what I mean lol >.>
Some things I'll touch upon are: How much more fun PvE can be, would have a purpose, fulfill that need to collect Über items, and basically farm.
My inspiration is coming from WoW, since I felt it had the best PvE (my second MMO so don't comment on that :P) that I felt had a decent PvE, but it is not my goal to turn this into WoW. I just want to see a more involved PvE setting. ^_^
Anywho, the first part is more likely, and the second part... I doubt will happen.
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Currently in Guild Wars, you have Missions and Quests to play around in till you finish those, then you have Fissures / Underworld. I haven't gotten far in Underworld, but I hear it's just more items, more xp, and 15k armor in a can.
So what I'm suggesting is (one that is so commonly suggested):
-A place for a group to defend against waves of monsters (in a Guild Hall probably).
--Assuming it's Guild Hall only, the top 10 guilds to get to the farthest wave would be posted on a highscore board.
-We need massive epic dungeons with massive goals, godly bosses, and unbelievably difficult. Glint anyone? ^_^
--These would make Underworld look hard :P
--Did I mention more bosses like Glint? Probably the best boss in Guild Wars!
-A multi-instance dungeon anyone? So you'd have Floor 1, Floor 2, etc as it progressively gets hard.
--Make it a goal to see how deep you get? Or Have checkpoints where you could continue later on and see how far you can get overall?
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Now I will touch on the lack of reward (except cool bosses!) and farmers. It's a looooong shot, but it's an idea ^_^.
-New *RARE* equipment obtained in the new suggested dungeons and possibly off of a boss each wave in the defence variation.
--This will put an end to people complaining about the lack of armor variety.
--Should be stand-out armor (It's new armor tho, so duh, it'll stand-out

--Make a profession specific set for starters than move out from there.
--Maybe have some resemble armor of monsters? (Mursaat> Elementalist, White Mantle> Warrior, etc).
-The new equipment would be well above the current pvp ones to farther complete the new dungeons and get higher scores.
--Probably thinking it'll "OMG it'll break pvp!!!" But here comes the next part.
--Possibly... (the whole rare items idea is a big possibly

--This special character will ONLY be capable of wearing the new rare equipment and can only go in towns that relate to the dungeons/Guild-hall.
-Will cause a money sink for the rich as they frantically scramble to buy rare equipment as they are found.
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OK! I think that pretty much covers what's been going on in my head ^_^
It's a lot of maybes, good ones, and some stupid ones. That's what suggestions and ideas are all about ^_^.
Thank you for taking the time to read this.