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.
OCCUPY ER, <=>
"The needs of the many outweigh the needs of the few, or the one." - Spock
Retired Mar 2014 at age 52
Target AA: 70% equity funds / 28% TIAA-Traditional/ 2% cash
Target WR: 0.0%,
Income from pension, rent, and eventually SS