The Hall is a very nice idea, but it needs work. With the approach of GW2, perhaps it is time to reflect on ways the Hall could be improved, so that it is a brilliant contribution that bridges the two games and serves as a fitting reminder of all the good times we've had.
Monument of Honor
Add a bookshelf.
The books are a great synopsis of the stories of Guild Wars, and would make a mighty fine piece of nostalgia to page through in the future. Include, on either side of the monument's front, a small section of shelves that house the books from each continent, from the bonus mission pack, from the golem hunt, etc, all the little pieces of lore collected through our explorations and adventures. That way, years from now, we can flip through them while sitting in the hall as a reminder of that amusing mission or that dangerous dungeon, memories of places we've been, things we've done, and monsters we've slain to get their shiny stuff.
Monument of Fellowship
Include an option to display friends.
A huge portion of the Guild Wars experience comes from the interaction with other people, with guilds, with friends and companions who have fought at your side against countless foes. To commemorate this, I suggest the Monument of Fellowship also include a friend option, the ability to construct a smaller statue that represents someone special to you. If you have a visitor in your Hall, you can make a request at the Monument and, with their permission, enshrine them just like the Resilience statues (and borrowing its script to make it easy) at your place of Fellowship.
From then on, whenever you visit the monument in the future, it will commemorate your friend and ally and stand as a testament to the trials you endured together.
Monument of Resilience
Currently, the account based display is bugged (or if this was its intention, sadly lacking). If you enter the armor of one character on your account, then switch to a second, you do not get to see the 1st character displayed upon the monument. Instead, the 2nd character is displayed in their profession's equivalent. So if you like Elite Kurzick Monk armor and save it, and walk into the Hall as a Ranger, you see Elite Kurzick Ranger armor, not the one you selected. Rather than display your five favorite characters, you can only see one character in five sets of armor, some of which they may not even own (and might look hideous wearing).
Suggestion: Have the monument save both the armor and the character who presented it. That way, you can have up to five characters on your account displayed upon the monument, a fitting tribute to those who enjoy playing multiple professions.
Monument of Valor
A great idea sadly lacking in options. It could seriously use a few more additions to round it out, while still keeping the theme of grouped weapons. In particular, add...
-The Oppressor weapons
-The Deldrimor set
-The Bonus Mission Pack weaponry
-Commemorative, specific greens. Urgoz's Longbow, Kanaxai's Axe, Dhuum's Scythe, the Rose Focus, the Traveller's Staff, Shiro's Blades, one green for each weapon type that is an iconic item from the story of guild wars.
-Any good collection of similar weaponry, like end-game Factions or Nightfall gear.
Etc. Find a good list of weaponry and add them in to allow a wider range of options, because at the moment the monument doesn't provide sufficient variety to let people pick and choose what they actually like.
Monument of Devotion
Add a Hat Rack for festival hats to display our five favorite pieces of headwear. Because everyone loves hats.
S

