I disagree here. If you look at the trend in modern ODI cricket boundaries are the only way to win games now, it sucks but that's where it's heading.
Here are stats for average runs per six balls:
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This is the best I could find but I'm sure if you look at the stats for boundaries Pakistan is one of the lowest especially if you look at sixes hit per innings. This is also why I'm predicting the winner of the WC to be either Aus, Eng. The other teams haven't caught up to that yet. More likely to be Aus to be honest because England's numbers are inflated by Afghanistan.
Younis Khan is a good batsman but he wasn't renowned for his sixes I think he would be great for helping the batsmen especially in test cricket but they need someone else a bio-analyst type person who can help batsmen figure out how to get big hits. Apart from England, Aus I think all teams need to work on this if ODI remains on this path.