to answer the question, yes, it would be completely possible for the dev team to allow for the adjusting of the grid, it requires a modification to the launcher2.apk included in the rom. no, i do not know how to tweak it to work. as said by dc84, there are some workarounds. one being apps like extended controls or multicon, or you could use a home replacement. the top three are go launcher ex, launcher pro plus, and adw launcher ex.