This server was a really cool idea, and a lot of people have been having a ton of fun on it (in spite of its problems). However the abysmal execution looks extremely rushed and not well thought-out. For the next one:
-Don't post potentially-impossible achievements like CBQ. Figure out what low-profile targets are doable in the window. If CBQ is the only "doable" GoD target, lower its extreme regen to a normal point that makes sense for a ten-levels-below raid.
-Add more achievements, with more rewards. One per expansion is alright, but you could go a lot further with it. OG Innoruuk could be added at 40, Tormax and Dain could be added at 50, Fennin Ro at 55, Bloodeye, Shyra, and Ture at 60, a whole host of TSS targets at 65 like Oblivion, Vergalid, Lorekeeper. At 70 you could integrate under-utilized SoF fights like Octa, Wirlem, and Scorn, with the big target/reward being Big Bynn. That includes a bunch of guilds in the running.
-It could even be expanded beyond simply boss rewards. For instance, finish the BIC at 60 for some mega-reward. THAT would get people excited. TLP vets love the BIC, but on the current iteration of the server I don't think many are bothering. Finished TSS charm at 70 could be another reward, as well as finished Planar charm at 55 or 60.
-Add something for LOY, I don't think LOY got one. Innoruuk in Nadox.
-Definitely focus the achievements on the lower side of a particular expansion. No expansion final bosses. You want these things to be doable by multiple guilds to have a stronger server, not just the top 1 or 2 guilds. Instead of Meldrath, go with Big Bynn. Contrary to morons on the board thinking I want an "easy" server, I just want one that makes sense and thrives. We would still have impetus to press on and try to kill higher targets (the loot).
-If you want to add some final boss targets, set them at 5 levels below instead of the 10 that most other targets get. For example, add Vulak and AHR at 55.
-Don't get all of the target ideas from a couple of guildleaders. Maybe get a bunch in there for the discussion, especially veterans of this one. I could come up with a whole list of viable targets from start to finish.
-Might want to lower a few more level recs on things like augments. DoN is a borderline useless expansion for group content at 60 because almost all of the augments are rec 70, which ruins the 60 or 65 equipment people are wearing.
-Basically just make sure to do a player feedback thread before starting work on the next one (if there is a next one) and listen. Field some reward ideas from the playerbase and implement the popular ones.