Not necessarily. To me Coombs is a guard where as Walker is a 3/4 player.
Walker is a 2/3. With that said, Walker would most likely be ahead of any of the 2017 commits. Only issue for Walker if she wants to play right away and will be playing behind Lou (3/2) and Collier (3/4) for 2 years, and Nurse (1/2) and Gabby (4/3) for a year.
TBH, if Walker commits and all 4 of Coombs (2), AEH (2/3), Gordon (3/4) all come, it would not surprise me to see transfers in the future. Look at the 2014 class, Nurse (1/2), Edwards (2), Ekmark (2/3) and Williams (described as a 2/3 in HS, but a 4 now...).