CSG's are often accompanied by submarines equipped with Tomahawks as well. But indeed, CSG's role in ASuW is immeasurable with the aircrafts on board.Do you mean ASuW capabilities? Otherwise each DDG and carrier strike wing still carry substantial land attack capabilities, no?
Possibly, this argument from 90s through 2000s has been obsolete as US has achieved remarkable low costs for tomahawk, that made it eventually comparable to the 155mm rounds* initially planned to be used on Zumwalt class.
* also the gun system, maintenance non-commonality through other surface assets etc. yielding to higher costs.