I have understood you point of view. Actually, there are issues doing that.

1. CC does not work...
bind is useless.
silence is almost useless, monsters uses TP skills.
stun is useful, but it can miss (!), it has long cooldown, FF14 uses a turn based combat, so I often uses stun AFTER the enemy's skill is casted (aka= I'm not able to interrupt properly).
Paralyze is "so-so", unpredictable (does it work? when?)
The only CC' skill working is sleep. sleep lasts enough, it has a good chance to work, a good area of effect.
A fight where we need to control adds will fail easily or succeed only for luck/unluck. This must be addressed

2. ..is it important?
Moreover, every tactic is worthless with the current battle system, because we got a trump card: battle regimen.

3. Do you like long fights?
Did you have kill the ghost NM in cassiopea? it disappears and heals itself, and the fight is longer than usual. Well, my LS's mates hate it for that reason, they prefer a faster fight like cactuar jack, for example.


However, I think SE will add something like you describe in raids and dungeons, but first of all, SE should change skills, CC, positioning, remove turns in combat, add special skill's effects on monster (no more red fog), add a TP/MP/buff bars over monsters... If not, the idea is good but the fight will be still confused.