even with FF11 we are far from the 5 game... in the whole FF series and spin off, you have about 4 game that allows a certain control over the summons over more of 20 games... that too little for really make it what define a jobs.

the 4th one is Final Fantasy type-0 that allows a full control over the summon.

and like said MMORPG are made for make caster different then summoner jobs tend to become a pet class. but even in this case, your control over the pet is quite limited.