my comment re 'slow' bowler options was based purely from the perspective of experience - eg Vettori, Wiseman & B Walker for spin, with Harris & Astle having dominated the slow - medium seam up / swing bowling........I don't want to see the selectors going back to Harris simply because they feel they have no other 'experienced' options.......
I know M Walker played in 3 matches in the ODI series in Pakistan and he would appear to be the logical alternative.....but I don't know if the selectors will see it that way with Harris playing well in State matches so far.......
I think one of the problems the bowling attack has at the moment is that we have no genuine 'slow' seam up bowler to take the pace off the ball to strangle the batsmen for pace to work with - a la Astle / Larsen or Harris in his better years......I'd be happy to see M Walker get an opportunity in this series......
I doubt that the selectors will drop McCullum for Papps to open while he is one of only about 3 / 4 batsmen in the side regularly contributing with the bat - the others being Fleming, Styris & Oram.......I'm also not sure that the selectors will want to break up the understanding that Oram & McCullum have in the lower order, as they have been batting well together in the ODIs since the TVS Cup......
Despite this I'd still have McCullum opening but with Cumming for this match (rather than drop Cumming out or down the order, as one way we are short in the batting with only Mills as the 12th player, or we are defeating the purpose somewhat by playing Cumming out of position when there are middle order alternatives that could be called up), & Cairns down to No8 - (if he plays which I think he will)......
like you I'd prefer to see someone like M Walker come in at No8, but I guess we'll have to wait for the 4th ODI to see if that happens.....