And remind where it said KDA has anything to do with League points?
All the "new" system is is catering to ELO Boosters/ELO Hell noobs who think it's not their fault. It's still based on winning, you still have ELO (albeit hidden), and you still have the same teammates.
EDIT: I just read the announcement post on the new system and it says, CLEARLY, that you gain League Points from winning ranked games. Not anyway does it say "LOL **** WINS KDA NOOB".
EDIT2: OP linked a Reign of Gaming article that shows spoilers of some strings of text that have no correlation to each other, but the OP said it did. The strings also aren't formatted. Move along people, KDA has nothing to do with League Points.