When I first wanted a 2470 again, I was worried it would seem boring, compared to the 24 L, 35 L and 50 L. I shot my primes at 2.8 a lot to get a feel for what I would get, and I didn't like it, I wanted to go back to 1.4 and f2. But I got myself a dirt-cheap 2470 mk1 and started using it a lot and I liked it more than I would have though, specifically the ability to shoot very wide dramatic shots, and then close in for a portrait, wonderful. However, the 2470 mk1 is really poor in the corners wide open, so using the out of center focusing points was always disappointing, so I wanted to check out the mk2.
Eventually bought it, and what I thought would be boring dof, turned into overjoy with that EPIC AF! I even enabled the non-crosstype points I turned off the first week of having the 1dX, with the 2470 mk2 I can use them as any of the others. And the fun of being able to compose how I like, simply by choosing ANY point and track a subject with it AND to have the sharpness better than the center of the mk1 is juuuuust amazing.
So I sold my 24 L, and I'm thinking of selling the two others as well, they simply haven't been used since I got the 2470 mk2.