+1, considering what you have to work with.
You could use it as an excuse to buy a Dremel. I'm not sure I would want to learn how to use a Dremel on that razor though, would hate to damage it.
After falling in love with me, my wife asked herself pretty much the same question. Fix him or just clean him up and leave him alone? She chose the latter. It worked out well for us and I think that's the right advice here also.
Yeah - leave it alone for now - if you only have a DMT and sandpaper, it'll be actually safe to take care of it - it's just you'll take a few years grinding it
On the other hand, a dremel and some abrasive wheel would make short work of it - but the potential for damage is very high, if you make a mistake...
I've done quite a few of these lately and I've noticed most of the toes seem to sweep back a bit. This seem a bit more than usual but many do have that general shape.
It could easily be reshaped to get it more square looking but it's a matter of choice. It wouldn't be a far leap to have it looking like new and most likely nobody would be the wiser for how much that would have to be adjusted.