My brother has been named as Executor in Will my mother had drawn up by attorney months before she passed. Should we have an administrator appointed to complete disposition?

before she passed. No worries there, I had asked her not to name me as Executor years before - sibling issues, mother issues, and I did not want reason for more. My brother wanted to avoid Probate (Washington state) and mother's Estate under $100,000.00 so could be considered Small Estate (no need for Trust Fund). Essentially though, my mother had two bank accounts, one in which she deposited her 6 CD's at $10,000.00 each ($60,000.00) total. The other which she used over the years as her primary account with her husband who passed in 2006. While my mother was still alive, my brother had the $60,000.00 put into his personal bank account - he has those funds now. He did try to close out her other bank account, and they were unwilling to be of service to his efforts as their bank requirements of Testamentory, and death certificate and personal id, etc. He was conscientious in distribution of items from her estate initially. I had advised him Washington state law may require something different than he wanted to do in the workarounds to avoid Probate. I did not know, having not been too involved in estate law, etc., was going off the information handout presentation Mom's lawyer provided at a Masonic event. In trying to find the correct way to go, I was using Internet, Google, learning what I could via online information about Washington state Estates and Probate requirements. I advised him I was more a by the book kind of personality, having had a career as State employee with RCW's, WAC's, and Policty whereas he preferred to continue to workarounds and avoid probate as probate was more costly to her estate. I am my mother's firstborn daughter, and we encouraged her to move here to be our neighbors and continue to the best of her abilities to live her independent lifestyle. She was blind, not entirely, enough though to hamper her mobility. Where she lived, owned her home there were limited services for teaching her to cope with her blind mobility issues. Where we live across the state, I learned there are services of extensive assistance to the blind, and explained to her she might have more productive mobility in using those services. She did move here for more reasons than availing herself of the blind services. My husband and I became, after a fashion, her caregivers, not fully recognizing or realizing that we were gradually becoming more than help to her for what she considered her independent lifestyle. We acted in accord with her wishes for that kind of a lifestyle, however, we did not realize the fears she had were much larger than her wish to live an independent lifestyle. So it was a bit of both, her independence, our caregiving where she would permit it, ie, walking her dog daily, driving her to social activities, feeding her prepared meals, driving her to services for the Blind, driving her to instruction course on living with Diabetes which was diagnosed while she lived here, driving her to dr appointments, trying to check in with her via visit to her home daily, and the list goes on. And then the cancer hit her....another story. After months of living with the pain in her upper right side, her dr telling her repeatedly to please go to Urgent Care or Hospital if pain continued, as the facility she was seeing dr did not have the equipment, she did finally go to city's large hospital, where we began to learn of the cancer. Her dr told me he did not know she had cancer, and by the time it was diagnosed, it was Stage 4 Cancer in kidney area. After hospital test results, MRI results, her dr named it as probably Cholangiocarconoma - in bile duct liver. We learned of her dx in June 2017, she died in August 2017. It was sudden, fast, and acknowledging that our family felt and is feeling the grieving. Where I am now all these months later, is wanting to get my mother's estate into Probate as two things are happening. Brother, named Executor, lives in AZ, and I am prepared that he may not be able to get to WA to have court authorize him as named Executor of her Estate. I have asked him to do so or step down from potential authorization. I recently have identified the situation to mother's estate attorney by letter, and am to meet with him end of this month. Also meeting with disturbing, almost accusatory assistance from the paralegal who will likely be taking on the work of her Estate. And I have despite several requests to my brother, advised him of my actions to meet with her attorney, as it will be another cost to her Estate in need to close out the one bank account, and to have the funds released from her second bank account. Based on best information I have to date, my brother can request his Executorship be renounced, and secondary Executor take his place. I am named as secondary in her Will, I do not wish what has now become awkward disposition of her estate. I am thinking it wise to have Administrator appointed to complete it. Thoughts??