No, and they really shouldn't. The G/F/W triangle is a very simple one that's easy to understand, and thus helps newer players.
Who cares, they're going to have to learn anyways, none of the other triangles are that complicated either, and Grass being SE on Water is one of the least intuitive things on the type chart.
The idea of Grass being strong against Water isn't as obvious as the other matchups, but it's easy to infer from the rock-paper-scissors triangle set up and it's not exactly difficult to grasp the idea of plants drinking water.
Also, I care, as do people who understand that games need curves, and wen you create a game you need it to be accessible early on to help people ease into it.
"Murder of the living is tragic, but murder of the idea is unforgivable." - Janus, speaker of the synod
I think it will in gen Vii, There are now six of each type of starter pokemon. That's enough for three teams. I predict that Gen VII will have a trio with the first 18 starters and the player will have to fight them with a new type combination.
absence of proof is better proof against than for.