Very nice mod.
I like the tanto shape myself. My tanto Sebenza has a slight curve to the cutting edge also. Of course, the tip is thicker than yours, and convexed.
I don't follow the usual prejudice against a longer handle, shorter blade. That's one of the positive advantages of the basic Military. The handle is long enough to do its job, which is provide all the grip in the world, even with heavy gloves. The blade is still long enough to do its job. Theoretical handle / blade ratios are meaningless compared to effectiveness of the actual knife. Look at the "superknife" or razorblade utility knife.