Things that should be changed or fixed already (because you haven't fixed it yet)

[Sove92]

1. Allow Chocobo to be out to use Duty Finder

Yoshi-P said this is something they have to do, but it's easier said than done, people who know anything about programming know why.

2. Tab targeting should be nearest target in front of you NOT left to right disregarding distance

Agreed, the current system is horrible.

4. Remove the recast time on Mudras to compensate for server side lag. (keep the 20 cd on Ninjutsu aka can still only cast Ninjutsu every 20 seconds...)

I think combat actions are coded in a way a cooldown is required. The solution is to reduce it to 0.1 seconds.

5. Remove the mount and unmount delay.

There isn't really any unmount delay, it's latency.

6. Allow crafting to pull materials directly from your retainers.

I think Yoshi-P said they were considering this. Retainers work on a separate server, though so I can see constant data transfers causing problems.

7. Add in a glamour book because you are too stingy/cheap/greedy to give us more retainers without having us to pay monthly fees for them.

Character data limitations.

8. Increase item stack to 999.

If they coded this in the way I assume they did, they can't do a stack above 255 or 127, increasing the cap to 999 would cause character data problems.

9. Increase armoury space because it's just not enough right now for players that levels every class.

Character data limitations. This is the first one they will address, as Yoshi-P said. They are optimizing the data every patch but the process takes time.

[FaileExperiment]

I think combat actions are coded in a way a cooldown is required. The solution is to reduce it to 0.1 seconds.

With regard to Mudras, I think what the OP means is that only successful Ninjitsu casts should trigger the 20s cooldown. Right now, because of the lag, it is far too common to enter incorrect Mudra combinations (or you actually do it correctly but the game interprets incorrectly), and these failures still trigger the 20s the cooldown. I happen to agree that the penalty for a failed Mudra input is too severe given FFXIV's known network latency issues.