I really have to respond to this, this is something SE should really consider doing. Now I wont break the answers down into the specific questions as other people have.
#1. I love the battle system and how the commands become a drop down list. I dont like the ffxiv bar at all
#2.Bring back the old spells that are tier based along with the different aoe spells. FFXI had it right. In FFXIV the way that they basicly took out the tiers and the fact that we are now limited to a few non- aoe spells, I just find it more trouble than it worth, now not to forget that the spells that aoe is another trouble some area as well.
#3. FFXI weapon skills that you earn by useing the weapon added to the game, in FFXIV your weapon is the same as your level. If the feature was in FFXIV people would be trying to skill-up, unfortunatly we have none and its kinda of lame.
#4. Most if not all the end game from FFXI cause we all know that FFXIV has nothing, personally I dont consider the primal fight nor moogle end game. Its just a time sync that was poorly designed.
#5 The job system to sub-jobs was really great. In ffxiv wow so we get to use abilities from other jobs, but we can only use 10 from other jobs. This in no way even comes close to haveing a main job/ sub job. The possibilities in FFXIV are limited, where as IN ffXI players had pretty much if you will unlimited possibilities.
I could go on and on from the auction house to the mog house. The problem is people complained it was too hard or took to long. Level-sync never did like it, never will, worst thing they could have done. The abyessa areas seemed to ruin FFXI. What SE is doing is not a bad idea the fact that it seems as they are trying to cater to both hardcore and casual alike is the issue. At this point in time everything is catered to casual players, what needs to be done is find a balance of the 2 not 1 over the other. I understand not everyone has the time to put in but what they have done with FFXIV has ruined the game, for now and only time will tell if they can actually recover from this mess that they created by what they have tried to do. What made FFXI was the fact that there was always a challenge, now in ffxiv um.. where is the challenge?