401K Conversion To IRA In A Living Trust

[megacorp-firee]

I have searched the forum and can't find the answer to my question.

I was told that I should convert my 401K to an IRA instead of keeping it in 401K after retirement. Something about the way distributions have to be taken by my beneficiary when I croak.
However my DW is the primary beneficiary of 401k and my living trust is secondary beneficiary (company form made me do it this way).
Instructions from lawyer was to have her disclaim the 401k in favor of my trust. She is co-trustee on my trust as I am on hers. Now the bucks would be in my trust, as we wanted it.

401K has some good choices for investments and fees that are in the .04 to .15 (for REIT) range. That is much lower than even Vanguard by 2/3.

Any one have any idea why I should convert 401K to IRA in this case then?
Am I even asking the right question?

Thanks.