I'm going to prefix this post by saying that it's quite late at night, and I'm not the best in general at articulating things well or supporting arguments in the first place. I apologize if anything I say is poorly written or thought-out.
That said, I want a G3, but only if it has the same love and attention put into that G1 had.
G1 had brilliant design and character development, as well as the necessary consequences of story and world building. For those who say that I'm comparing 10 years to 2, fair enough, but year 1 had MNOG, which is far more than G2 ever had. Was there ever an Okoto Online Game? G2 sorely lacked that interactive story experience.
People say that Tahu Gen1 and Tahu Gen2 are different characters and as such shouldn't be compared, but that doesn't change that Tahu G2 didn't have nearly the depth that Tahu G1 had. This is a fact, regardless of whether or not they are the same character. Transformers remodelled Optimus Prime several times, but each time he had at least a similar level of depth to the version that came before him. The point is, BIONICLE has already demonstrated an ability to give us in-depth characters and world-building, so there is no reason why we should not expect that same level of quality from the new as the old. Just because Transformers G2 was different from Transformers G1, doesn't mean that it is wrong to compare the two or expect similar levels of depth and quality. Even though they didn't have as much time to build G2, even first year G1 had better storyline than G2 had, or at least articulated it better.
Despite all of G2's shortcomings, I would like a G3 after LEGO gets it together and decides to do it right, (right is inherently subjective.) I personally want the G1 building system back, but that is just my nostalgia talking. Really, if they just rereleased all of the G1 sets with identical canisters and characters, I'd be happy. If the Toa Inika reappeared on store shelves with a price of 20$, I'd buy every single one without batting an eye.
Again, this is all just my opinion. Thank you for taking the time to read my exasperatingly long paragraph where I repeat myself over and over and end with something that should probably be in a separate post. I don't know how to conclude this, so I guess I'll just stop here.