I agree with the above plane of tranquility would make an awesome quest hub for group xp all the way to tier 10 (plane of time please !). I first started playing a single toon but even way back then when you could do that it was often required to play a few boxes by hand because mq2 was not allowed. So i eventually worked up to a full group boxing by hand and our guild of 4-5 worked out way up to dsk when it was released. Eventually it became to complicated to do without a program so we all slowly faded away. When MQ2 became legal it brought us back and we have been playing off an on now for many years trying to work out way without the help of donors besides maybe a weapon/necklace on our "main". So many good ideas have been present here and I would love to see a lot of them implemented to get our population back up to levels of old. However, after spending many years of my life playing here and putting in countless amount of hours it would be really hard to let go of the toons i have worked so hard to level,flag, and gear. Hopefully there will still be a place for those of us that have adapted over the years and have a raid of our own. Some of the things I'd also like to maybe suggest:
Augments:
The augments on this server are great, and are probably the most important things to farm and invest time in. Especially with the new tier system which incorporates the augment scores into your gear score this has become a really hard paywall for those of us who can't spend tons of money to buy distillers. While some of the augments are easy enough to obtain again such as aviaks, kodiaks, and hoh there are many that would require a large amount of time and repetitive killing to get (not to mention holiday augs). Quite honestly this has prevented me from auging most of my characters because i do not want to waste good augs on gear that wasn't "final". I would love to be able to earn augs and keep them and enjoy trying to progress through all the new zones rather then being forced to re-farm augs every time i upgrade a piece. Now lillu has made it abundantly clear the one item that can summon these distillers will never drop in price, and thats fine. However, an alternative can be found to make it fair to the rest of the people who can pay for them. For example maybe make an item along the lines of a epic 3.0 quest that summons once a day, or add them as a very rare world drop line the holiday items, or as a less rare to named mobs. Something like this would let people work towards progression without the constant need to refarm stuff, and in the process make the server more fun.
Achievements:
These have always been a very fun part of this server for me I love trying to obtain them and Im happy you are going to expand on them. I also see this as an opportunity to make use of old zones and such. If you make rewards such as more buff slot AAs or possibly bigger bags associated with achievement point milestones more people will take the time to go back and complete all the content they might have skipped or missed.
AAs:
Like people have said above there are many AAs that do not either work or are useless here. A revamp/fix to some of these would be greatly appreciated. Also something that would be cool (if possible) would be zone AAs which would give a little boost in someway to the zone you are currently working on. A good example would be to help mitigate VT debuff a little if you aren't able to do all of dsk3 yet, or maybe even AAs to help deal with the effects from HoH mobs. This would greatly expand the AA system without making people overpowered because they would only deal with a specific zone.
Wiki:
This applies especially to holiday events a list of quests should be provided so people can try and complete everything in the limited time then have. However a more complete wiki would also be greatly appreciated even if its just clues. I realize this was mostly player created entries, but maybe add a team member in charge of creating/updating entries. Players can still write them but submit to that person.