It's really annoying having to waste an action reequipping my greatsword after throwing the pike, ironically making it a poor choice for a side throwing weapon when it should be great. Just make it go back to your inventory if it wasn't already equipped when thrown please.
For those who use the pike as their primary weapon, making it go back to the inventory would completely ruin it, because they'd have to equip it every time just the same. I think a good solution would be the ability to put the pike in your ranged weapon slot instead. (as I'd like it to be for all throwing weapons).