OP, how often does your bird use the healing potency buff? Curious what the hidden cooldown for it is, if any. I'm rank 7 now but stopped because last time I leveled it I damn near went insane going from lv4-7 in 24 hours. lol
BTW, to those saying bird is gimped by not dedicating it to one tree...the stances (save healer stance) really have a minimal impact on the effectiveness of the bird since they for the most part only limit the bird to using actions in that tree. For one, at 50 it has only about 2000 base HP, which is low for any job. Going completely down the tank tree to 10 will leave your bird with less than 2500 HP with way fewer defensive cooldowns than a real tank and the enmity is a joke. The DPS abilities and damage do not get substantially better as you progress down that line as well. Healer stuff is actually useful due to the way it spams but I would argue that the medica is almost completely not needed due to the fact that you'd probably want your bird over even a SCH faerie with the SCH AFK close to never making it really only useful for solo only where the extra 15% crit would be nice for its single target healing skills.
If any feedback to devs is being given from this post, I would recommend to:
1) Increase chocobo base HP to about 3200.
2) Have stances have a dramatic effect on the bird's stats (as opposed to basically being for a minor AI change now). For example, tank stance increases bird max HP significantly and increases enmity, damage taken reduced etc. DPS stance increase attack power, weapon skill hidden cooldown reduction, attack speed, and so on.
3) Ability to use while DFing and ability to do instanced content alongside them (ie, not with random people but where you and a friend could both summon birds and do some light party dungeons).
4) Actually add stuff to the open world that you would want to do at level 50 that would require your buddy. The open world right now is almost exclusively only good for leveling currently....