Hmm, I have mixed emotions on LoK. Personally I hated how much focus was spent on dumb love triangle that was handled in extremely bad way. Not to mention that Mako got away with all his cheating and was never actually put on spot for it. If I was Asami, I would stop talking to him ages ago after the way he treated her.
Not to mention that I hated Korra's guts for 2 seasons. She was an extremely arrogant and self centred character who only cared about herself and never listened like a spoiled brat. I mean who goes off and bluntly steals off someones boyfriend, says crap to Tenzin in season 2, who was her best teacher and pretty much starts a war. Disliked her in season 1 and wanted to murder her for biggest part of season 2.
For me, Lok really picked up in season 3, my fave one. Korra finally got off her high horse, no love drama, actual development for Lin, interesting and strong villains and etc.
And out of all love possibilities for Korra in last 2 seasons, Korrasami made most sense since they had tons of moments together and subtle hints here and there. Borra died in 2nd half of season 1 and Makorra became one sided on Mako's side from season 3, only pure friendship remained between them. Apart from work, they barely even communicated.