Marshall/Mincer - Snoopy, think you could be right, although at the start of the season I'd say Wallace would have got it on form anyway. Marshall was doing good things, but he also did a few too many bad ones as well, and Wallace looked in the form of his life. But it does make sense, obviously Marshall offers much the same set of skills to call on, but he's not got the same cool head. Jackson's biggest weakness so far is he feels his mistakes too keenly, they knock him off his stride, and while he keeps trying and can sometimes find it again, having the likes of Pienaar and Wallace around could be helpful. Then again, maybe not; Humphreys publicly said he felt having Jackson start the season without Wallace and Pienaar nearby was a good thing, as it put the weight of responsibility on Jackson's shoulders, which is useful. Doesn't mean Anscombe feels it, but it does put a hole in an otherwise sensible theory.
Since Marshall came into the team though, it's not been a form selection. Wallace might be a bit demoralised, but his defence is nowhere near as robust and he hasn't made things happen ball in hand. The last game before Marshall got injured he looked majestic - almost no silly offloads, excellent work ball in hand, and some absolutely savage defending. Has also hauled down Jonathan Davies in full flight, which is rather impressive. That is why I want him in; on a 50-50 I'd have given it to Wallace, but it doesn't look that way now. Also, Payne coming into the line offers an excellent alternative for a cool playmaker.
edit - On Jackson - His form has been a little up and down this season but I would point anyone who doubts his value to the Castres game where we improved so much when he came on. Part of that's having Pienaar at 9, natch, but Jackson's accuracy and decision making are very easy to miss but very important to his fellow backs. Maybe if you're not watching him every game, or not watching that closely, it doesn't shine through - the boy has a serious talent though. And I am happy to let everything ride on that; he'll make mistakes, sure, but this is his time.