Vector support for compositor

Now that AOVs are a standard feature, I feel like it would be useful to have full vector recognition/support in the compositor. Right now, you can output 3 AOV values but there isn't really a good way to combine them into a vector or do math on them (packing them into a color seems to clip the components to 1?). The only use case I can think of right now is texture coordinate manipulation for post process UV mapping, but if they ever fix OSL to AOV output, then full vector support could open up a lot of fun possibilities. Alternatively, implementing OSL script nodes in the compositor would also allow a full range of mathematical manipulation on any AOV input.