Wow. Just wow.
I'm really sorry I didn't get these on this blog faster. Korra's final season would be the most must-see thing on TV right now if it wasn't online-only.
In any case, here are my reviews. I feel these ratings are completely justified:
"After All These Years" (Episode 1) - 9.6/10
"Korra Alone" (Episode 2) - 10/10 (Perfect 10 club; First for LoK, 8th for Avatar Universe)