The new Golden Golem, while better than the old design, actually still is pretty weak. The idea is gilding enemies with its new cast and then attacking with another, or getting Gilded via other sources. They also are designed to be Retaliation Attack machines, yet that aspect sadly never applies, as the only reliable way to get some retaliation attacks out of an enemy is via taunting.
Now, I don't think Golden Golems should get a Taunt, that probably will be too good. Instead, Tome of the Golden Realm could use a spell that applies an AoE Taunt! You target one of your units, it gets Golden Curse for one turn (for any non-Golden Golem you want to put this on), with this unit then Taunting everything in a 2-hex radius around it with a 90% success chance. Call it "Allure of Gold"!
This spell will then allow one to get everything out of a Golden Golem, and perhaps get them out of the hole they've been in for years now! Spell should probably not affect heroes, though, as those can get ludicrous Retaliation Attack numbers out (and can get Taunt themselves).