Yes a change in a beneficiary designation does not require a change in the will. In fact you shouldn't include any of your retirement accounts in your will, just make sure your beneficiary designations are all complete and up to date. You can usually do that online.
“So we beat on, boats against the current, borne back ceaselessly into the past.”
Current AA: 75% Equity Funds / 15% Bonds / 5% Stable Value /2% Cash / 3% TIAA Traditional
Retired Mar 2014 at age 52, target WR: 0.0%,
Income from pension and rent