Oh I see!
What a pity that this strategy wasn't implemented PRIOR to super tuesday.
Decentralized control AND decentralized execution, which can best describe a grassroots movement operating on its own, does not allow for strategy, merely tactics.
The HQ can offer strategic guidance to everyone (the definition of strategic is that it encompasses the "big picture"), but the individual meetup groups and precincts can only execute guerilla style tactical methods without this centralized control factor.
If one frames this entire race in the context of a war, with the objective being an eventual presidential nomination (for this battle...a national election being the final battle), this becomes more obvious.
As we like to say in the military: the best method is Centralized control, and decentralized execution.
Unfortunately, campaign financing regulations prevent many direct lines of communication and control between the campaign HQ and the grassroots efforts, so we're stuck with perhaps a strategic vision within the campaign, but an inability to most effectively execute it within the decentralized and disjoint ranks of the grassroots.
In short: Yes, such strategy is nice to think about (especially in the perfect vision of hindsight), but unless its massed and organized, it's not as uber-effective as it may seem, as some will agree and press with it, while others will disagree and resist it.