I have some thoughts.
On my computer now so I can actually type, but I think this would cause some issues where the gussets come together on the underside so it'll need more adjusting.
Anyway, I think for the most part all it really needs is to have a seam allowance added. This is mostly the same pattern plus another 1/4th seam allowance and I am wondering if they just forgot to add it to the original published pattern. The only piece that does have a seam allowance drawn on it is the tail.
The only thing that makes me think they didn't forget is the "sew to here" dots, but those could be wrong.
Another small change I made was making the front piece shorter so the head is more toward the front and less sticking right up in the middle of the body like a minecraft creeper. I think that'll cause a little trouble where the underside gussests come together, though.
I kind of don't want to, but I guess I'll try this pattern.
I shortened the upper body piece at the "neck" area, and extended the head sides by about a seam-allowance-width, then, once the front and back pieces and gussets were cut, I shortened the front piece and gusset by trimming length off of the bottom/feet area
That’s pretty much what I did. I think I did my reduction a little lower.
I'm really struggling with not being able to use the mobile app and Tumbler on the mobile browser is SO BAD.
But here is the original vs the changed one.
Actually I'm wondering now if the ear stitching was supposed to be done before stuff instead of after. That might make a difference in the way the head looks?
Wow did I sew that poorly....
Regardless, I think this is a little closer to what the illustration shows, but it's still not the same as the illustration.
This size is certainly a little less pointy.