I would never recomend that a client do anyway WL completely for Term. But what I do recomend is maybe reducing the whole life and replacing the difference or more with term if its needed.
For new clients I usually do a mix....I had a family that wanted 300K on husband an wife.
So I did 25K WL and 275k Term.
Sounds good to me. The kids will be gone and the house should be paid off when the term runs out and then they will have the 25k for burial and other needs.
I would make sure to have R.O.P. on the term so that they also get their money back and that money can also help with some other things they might need.