Miller kicked a few goals for us in 2015. Different skill set, but his drop goal from half way, in a pressure situation, to me would give an indication that he has got a decent boot on him.
On the other hand, Hampshire kicked 24 goals in his Wigan days, and if he is going to take over long term from Finn, then potentially, he could end up being the kicker.
Also, should he get his chance, and go well, doesn't Ackroyd kick?