As the character levels up, they get to have the bio of their companions. There is no spoilers involved if what bonuses they provide in crafting are shown along with primary and secondary weapons, attributes or what they like or dislike. What it would do is inform the player so they can make choices as the game progresses what sort of crew skills they need, esp. when there is only a three skill limit.

Got my second Companion, and the ship, and I found out that between the two of them and the protocol droid that comes with the ship that they all have the same skills that was selected at the beginning. Would have been nice to know about that from the start. Is the limiting of up to three skills a means to make people have to engage in trading to get missing components they can not make themselves (synthweaving, for example has three suggested auxillary skills, but you are limited to only two others at the same time)

Being able to look up what the bonuses (primary and secondary) to the companion crew skills is as useful as their likes/dislikes, weapons and attributes. Rather than having to get a skill first to find out what the companion's specialties are, it should be available to see before picking a skill for them. And yes, being able to keep track on which Companion is better suited for which skill is just as important down the line as it is on the first choice.

To spare the need to get a skill for your crew member, only to find out he/she/it gets benefits from other crafting skills, it should be noted in their 'Characters of Note' section, just like their 'likes/dislikes', attribute specialties and weapons. This would also allow people to decide which ones to pick for their crew member more on the fly/in-game, rather than having to scour the forums for what their crew members excel in their skill set.