Hey ,
Firstly maybe it is worth to think about a Link to this Thread ingame in a Scroll Banner or even Link from mainpage /launcher . My guess is most newbies dont know about forum or how to handle it yet. And that newbies respond in this thread about what they would wish to have etc is the most important.
From what i remember from my Starting Time , Quests in general where pretty boring and came down to either Kill X Mobs, Harvest X ressource or deliver that to NPC X. Talaghan Questline is really good and i would wish for this in all Zones , but i guess that is a shitload of Work.
I would also not remove the lvl 80 Boost as a good portion of new players come from other RoM servers and have probably quested low lvl contend 20 times and are bored of it.
A rework to the Starting tutorial is probably more then overdue , also from the First Tutorial Quests in Logar e.g Visit the Housemaid , Visit the AH etc can be made more uptodate and in-depth.
Also wat Lorise was saying about what to do once you reach Max Level would be awesome e.g where Custom Content starts , Hint about Shell Gear ( its op for newbies), daily stuff , Some sort of a Guildboard.
About mechanical stuff like how skills work, non gcd´s stuff i would not go into detail that much , finding such things out is part of the experience i guess.
Also automatically Placing new Players into a Custom Chat channel would be awesome , with a Hint at the Start like "Hey we see you are new Here , we placed you in a Chat Channel for newbies where you can Ask questions etc" , where also maybe some veteran players can be inside to answer questions/ help the Players.
Another Option would be a Godfather/Godparent system , where for example in Logar or varanas is a big "guildboard" like Placed somewhere where veteran players can "advertise" themself and newbies can send a request to them to become their "apprentice" and have a Person they can ask for help in any way.
Greetings