No, it wouldn't be a win for everyone. What it's really saying is that once every decade or so, large companies that do not immediately need capital during that period, are free to repatriate their earnings at a reduced rate.

Meanwhile, smaller companies and companies that are less profitable (and need those funds to stay in business) are forced to repatriate funds at a higher/normal rate.

And that difference amounts to a subsidy to large established multinational businesses OR a surcharge to their smaller competitors (depending on how you want to look at it).

If the rates are so high that we need a tax holiday, then they are simply too high, and need to be lowered or restructured.