Ok so the mechanic works as intended, fair enough. But what if it was made that the item used is snapshot. If you die, you can resummon the golem without using a new item and it keeps the previous stats. This way I and others would be more inclined to "invest" into the golem.
The skill tooltip could even show the list of inherited stats. It might get long and a bit unruly, but I don't think people would complain.
I don't know what the code looks like for this skill as it's already a pretty unique mechanic or if this is something that would be easy or feasible to implement.