Admittedly this fix needs to go on the bottom of the priority list.....

Dwarven Armory does NOT allow you to put the +1/+1 on opponents robot troops. The card does NOT state "a robot troop you control" but the UI states that when you activate the card.

For the record, I should have been able to pump up a robot troop to a 3/3 before using my One-shot ability with Mancubus and stealing the troop, but I couldn't.