Lmaol. Dude. Just stop. No offense.
They are not doing that. Obviously. Once again, obviously.
This is a continuation, CONTINUATION, of the Looney Tunes film franchise. One they have been working on since Space Jam. There were supposed to be other sports looney tunes films as well, NASCAR amongst them but they went with Back in Action which continued with 2d effects with 3d to fleshen them out and stand out more, the computers probably just got more advanced that those 2d images could become more crystal clear and digital. YOU said you saw no "point in making them 3D" after I made mention of Aladdin. Fact is pure 2d died out in the 80s, ever since the 90s practically everything has been 2d with help of the computer to make it more 3d. All the 90s Disney films included.
And you're bypassing my obvious point by not stopping to check Back in Action. The Looney Tunes brand made one thing clear- they are sticking with the same formula that's worked in the past. And if they wanted to do what you're suggesting? When Back in Action first came out they COULD HAVE easily but DIDN'T.
All you will see is clearer 2d rendered images, as has been honed since the 90s, and AT MOST like the Coyote short posted above. This isn't a reaction to those films you posted, this franchise existed long before that and more of these films have always been on their mind.
ADDING. check out the BACK IN ACTION trailer.
http://www.youtube.com/watch?v=3uuNGbMsb1A
Just like Space Jam and this was AFTER scooby doo and Stuart little. If they wanted to go a different route, they would have.