I more or less agree with most stuff above.

Some points i strongly recommend implenting asap. (sometime after worlds are back in order)

Anima
- I could manage to be low on anima, if there was a Mage that can actually teleport using mana.
(bit atm thats no the case)
So until then i'd like to see an increase in Anima regen.

Map Markers
- It's something from FFXI, but still a great idea, looking at the 2D map & trying to match it with the 3D physical map is something completly diffrent. The maps are huge & are somethimes hard to see if your are close or not since most things look alike. (not everywhere)

Over coming world obstacles... (Jump related)
- i really like this idea over jump, people have complained about fences, elevated surfaces etc & want jump.
Why not like suggested above make us slide down hill's instead.

I mean running into fences & getting stuck... thats just a lame excuse for being lazy & not walk around it.

A player who gets stuck on a fence is obviously blind, stupid & have
the reaction time reduced to an absolute minimum if their not able to avoid such
an obstacle, when they infact can several "Yalm's" ahead of them.

Mailbox
- Just like OP says, we need it.

Linkshell Options:
- This really needs major improvements.
We must be able to kick/promote/demote members even if they're not online.
I shouldnt have to restart a new LS because some ppl are idiots.

LS Message , a must have feature.

It also causes havoc on the Lodestone LS page if we have to drop LS, especially as LS leader.
All post etc will be gone if Leader breaks LS. >.<

Sign Crafted items:
- This option was awesome in FFXI, its also a good way of promoting crafters.
But instead of using a special crystal, i would rather see an "SIgnature" buff or action
that at the end lets you choose to sign the finished crafted item or not.

I wouldnt mind having to do a Quest to get this option, that would be pretty cool.
Or pay some guildmarks to unlock this feature. (prefer Quest thou, to make it more interesting)