Elliot had a very good day with the boot on the occassion last season or so where he took all the kicks. I think however we'd definitely leave a few more points on the field without Gopps. However, Gaby + Daly looks more defensively solid to me (Gopps isn't bad, but Gaby I feel would defence better at 12, and Daly is fairly good at 13), and I believe in attack Gaby and Daly is more likely to create tries, and therefore missed kicks matter less. It's a tough one, but we can't keep playing both our 10s.
Simpson did look very good against Wuss, but he also knew he only had 15 minutes to play, I imagine for a scrum half they could likely do everything at double speed if they know they've got a small amount of time to play. I think Dai's potential decision on who he prefers was more shown by Dan staying on for 65 minutes. Maybe he plans to rotate them now though, and wanted Simpson relatively fresh for next week.