It's just like the people asking why Thanos didn't come with the gauntlet. HT isn't Hasbro, including accessories just for the heck of it.
....... And why not? for the prices we pay, almost no request is too much for what we get. As TrashCat mentioned, seeing the reduced amount of accessories WS #2 comes with, the price SHOULD have been adjusted somewhat. That's ok, I can scrounge him some weapons. Heh, I'll give him Loki v1.0's knives. [Nah, not really. Not right from a thematic standpoint.]
As for the blown-off cyborg arm, would be an interesting custom but as for me, no don't wanna see that on the shelf. I would be sad every time I saw him.
Meanwhile, perhaps the ladies will enjoy this video I happened to run across on Vimeo. [I am NOT the creator]
https://vimeo.com/167073688
..... Dat motorcycle tho!!