Battlegrounds: Spare Parts! 1 new Hero + 4 new cards.

I am actually a little puzzled towards what direction to take it. I have two solutions; to give all three spells (Emergency Coolant, Reversing Switch and Rusty Horn) Twinspell and scale the two others by 1 statline or I could up the powerlevel slightly by having Armor Plating give +3 Health, Whirling Blades give +3 Attack, Rusty Horn give Taunt and +2 Health, Emergency Coolant Freeze a minion and give +1/+1 and Reversing Switch with Twinspell. The former scales linearly, and ladder more creatively. I don't mind that it scales creatively, as the fact that it becomes 1 spell makes it slightly weaker, but I am a little puzzled towards if that would be too powerful. What do you think?

/r/customhearthstone Thread Parent Link - i.redd.it