It's more of a patch-up for economic reasons than a true fix though isn't it. A true fix resolves an identified problem, which doesn't apply in the case of the 787. The reality is that, if they waited until they did find the cause, many airlines and Boeing might be bankrupted.
I fully understand why they've gone down the route they have but I seriously hope there isn't another similar problem, otherwise the ultimate cost to all concerned will be considerably higher than this 'fix'.
For me, the aviation safety culture has changed now and I'm happy to wait to fly the 787 and see what happens over the next year or two.