I'd take talent over system every day of the week. To be fair, the original question was around why Farrell has taken MH over DG, which you've answered but I know if I was picking a Lions squad/XV i'd have DG in it. I'd take Darcy over Duhan tbh.

As a winger, being a better finisher trumps all of the other features you mention. MH is clearly a Farrell favourite and that's why he's been picked. On pure talent DG is comfortably better.

‘Wreck the hoose juice’

Absolutely this.