While I have to say I agree with most of what Azthran said, I still can't help but argue that the Egis could benefit from a size increase. As Hyrist said, the Egis appear to be about 2/3rds the size of the Hyur Summoner shown in the original video, so if thats the case would added an extra 1/3rd to their size really be that game breaking for melee classes?
On the topic of pet control however I sincerely hope they add a separate interface for controlling Carbuncle or your Egis. It seems almost useless if they have to take up a party member slot like the Chocobo companion does, and if I have to manually click on my pet in order to casts heals on them or something I'm gonna be disappointed, not to mention that the actually method for micromanaging the chocobo (changing stances and what not) was pretty bad, especially given you had to make a whole separate action bar for it if you wanted to switch stances regularly like I did.
On the topic of pet control however I sincerely hope they add a separate interface for controlling Carbuncle or your Egis. It seems almost useless if they have to take up a party member slot like the Chocobo companion does, and if I have to manually click on my pet in order to casts heals on them or something I'm gonna be disappointed, not to mention that the actually method for micromanaging the chocobo (changing stances and what not) was pretty bad, especially given you had to make a whole separate action bar for it if you wanted to switch stances regularly like I did.