FERS Federal Fact Check - The Importance of Filling Out Beneficiary Designation Forms

I am a Federal retiree and fine with Thrift Savings Plan (TSP) and Federal Employees Group Life Insurance (FEGLI) standard order of precedence beneficiary assignments being spouse, then children in equal shares. I understand this order of precedence is followed when no beneficiary forms are on file. I have not submitted any beneficiary forms.  Are there any advantages/disadvantages of filling out beneficiary designation forms to restate this assignment? What are the advantages/disadvantages to naming my Revocable Living Trust (husband and wife) as beneficiary? https://bit.ly/3r7E0d9