Couldn't agree less with the first part,
The time for experiments will have long passed once the warm-up games come, in fact the official squad will have already be named so you would hope that we have come to the conclusion of what the best side, or structure is by then.
Arranging for further games/ series prior to the warm-ups is a great idea and the perfect time to be experimenting, looks like the Pakistan A side will be coming soon, a great chance to try out some different things, also there's still that mooted series v Namibia, which might be in jeopardy now they have to go through the qualifying to even get to the CWCQ.
I don't have an issue with them trying different things in this series with the players selected, these are the best 15 cricketers in the country so which ever way they go, they're still going to put out a strong team.