I’ll just quote the proeminent WG Staff member (he said this on the forums, here):
„I don’t necessarily agree with the proposals to limit RNG (not because we don’t want to do that) – they have their own issues. However, the rest sounds good and is pretty close to our thoughts on the subject at hand. We will bring back training rooms eventually, but they require a UI rework, while at the same time they’re not a high priority for us at the moment. We’re also thinking of experimenting with larger team size for the next ranked season.
As for the elo suggestion – i like it personally and the mechanics are there (Team Battles use them), but there are other factors we have to consider as well. We’ll see what the future brings to Ranked Battles.
We’re anyway working on making artillery mechanics more skill-based, just not necessarily the way you proposed. There were more than 50 ideas brainstormed by the dev team and some are being prototyped at the moment. You won’t see any results in the immediate future, but i’m hopeful some of them will be good enough to get to a production environment.”