Another example on how and WHY Rarity levels would be good.
Chief Chirpa (lvl 1)
Ewok Elder (lvl 1)
Teebo (lvl 1)
Ewok Scout (lvl 3)
Ewok Warrior (lvl 4)
Slew of other Ewoks that could be added (?)
Firstly, I personally believe the Ewok Elder is powerful enough that there should only be one, even though it is a generic name and could be justified in that there are multiple "elders". Maybe a new less powerful attacker/healer, but there shouldn't be multiples. Secondly, I'm not going to worry about EVERY possible Ewok they could add, mostly because there are so many.
So just looking at the main five, there are a total of 10 Ewoks (1 Chirpa; 1 Elder; 1 Teebo; 3 Scouts; 4 Warriors). The Elder is available in light side Hard 2-C, and Teebo is in the Galactic War rewards, so they and the Scout are all relatively easy to obtain. And I'm suggesting the Warrior be available for farming from easy levels (since it's a lvl 4 character), so a new player could without too much hassle get a team of 5 Ewoks with Teebo, the Elder, and a combination of scouts and warriors. This would allow for a decently powerful Ewok team, the Warriors almost only being there to take advantage of the other Ewok abilities (Teebo's speed boost and the scout's attack boost).
Eventually, as better Ewoks become available, such as Chief Chirpa in Cantina 5th tier, they can swap out the Warriors/Scouts for them. But the extra Warriors/Scouts would not become obsolite, they would still be very useful in the Galactic war, or in future content such as the Survival battles I suggest in another thread.