I would have to agree...
While a resurgent Russian submarine force may be a formidable opponent in the Atlantic, we have the advantage of having a large number of allies in Europe, most of which have substantial naval infrastructure to control the waters around Europe.
Lots of warships of all kinds, lots of ports, naval harbours, naval bases, substantial MPA capabilities on both sides of the Atlantic, plenty of AOR capabilities, etc etc. The Atlantic, with all of the contributing naval forces of EU and NATO countries, has a robust naval presence and infrastructure, and can saturate the Atlantic with naval assets if need be.
We tend to forget how big the Pacific really is. There is nowhere near the amount of naval infrastructure, or allied countries with professional 'western' military quality military forces. When you get across the Pacific, yes - there is Japan, Australia, New Zealand, Guam, etc. But even then, it isn't anywhere near the density of assets that the Atlantic offers.
Why not consolidate the sub fleet to the west coast, along with the training, simulators, support folks? If our training & support for the fleet is out East, yet half the fleet is West, I'd have to agree that a 'refocus' of our submarine capability might have a real noticeable affect on the fleet's capabilities. :2c: