yeah
obito and kakashi didnt seem too close in this chapter, but then again, naruto and sasuke were rivals and they were bonding, but they barely showed their friendship except for a couple of times

obito probably gains the sharingan and becomes more of a competitve rival to kakashi later on
who really knows how long that would take
i too believe that kakashi doesnt lose his eye in battle, but the scar doesnt seem like it was surgically done, if it was, then their would be much scar left because the stitches would heal it up and disappear