The issue of 'who scripted it' is irrelevant. I find it somewhat annoying that you choose to publicly put this on the forums asking me for an answer even though I gave you one on Graal. I also find it odd that you put it in a thread currently discussing our Easter Egg Hunt...
Probably the main reason I am not going to use it is that I am redoing the movement for GScript2 anyway...
On the diagonal yours should still do the bouching if the player is holding just one directional key, and it feels wierd (to me) that it doesn't
. I have also managed to hop onto walls using it when travelling down the diagonals. I know the conditions my movement breaks down on and why, and these are fixed in the GScript2 version. Also, Its not the simple job of copy and pasting you believe it to be. There is at least one new bug which your movement adds to the gani handling on mine (which may or may not be easily solvable), and there may be others relating to cliff jumping and stuff, although I've not checked.
In short, the effort it would take to put the two together is not worth it considering the GScript2 version will superseed it, and its not like theres any major restrictions with the current implementation.