My attempts at cards for these dudes:

Glitterstim (2)

At the start of the Combat phase, you may discard this card and receive 1 stress token. If you do, until the end of the round, when attacking or defending, you may change all of your focus results to hit or evade results.

R5 Astromech (1)

During the End phase, you may choose 1 of your faceup Damage cards with the Ship trait and flip it facedown.

I know, but different too. There are lists of cards in this game that are similar to each other. R5 and Determination for example.

K2S0:

What "roles" did he fill in Rogue One: Pilot, co-pilot, bodyguard/"muscle", interfaced (like R2-D2) into imperial systems, calculated probabilities for succes (C3PO).

Most memorable moment, that may become a new unique crew ability? There are many, but I like the the fact i sacrificed himself in the end in that glorius firefight to let Jyn and Cassian escape.

When defending you may discard this card to deal one face-uo damage card to your attacker. 2pt.

Chirrut:

What "roles" did he fill in Rogue One: Wiseman/force-sensitive (like old obi wan), master shoot, bodyguard/muscle. Most memorable moment, that may become a new unique crew ability? That "I am one with the force and the force is with me" immunity to get to that comms-switch in Scarif.

When defending, you may discard this card, to cancel all defence dice and add 2 evades. 2pt.

I'm was a little bummed there was no K2SO... I was ready with my 'good luck charm' for his crew card. (I like to use figures for reminders and fun) I really hope we'll get him soon.