I think its good match making. Grasso is a perceived gimme fight so Claudia can get back into the win column because she is still a prospect that has yet to fully flourish. On the other hand, if Grasso does beat claudia, i'd say that immediately jumps her to ONE win away from a title shot regardless of who is holding the title. The Brazilians are that "established" as top 3 of 115. Both of them could even move up to 125.
In the end, if Grasso loses in comeptitve fashion, I dont think her stock drops at all. It's great match making! Claudia vs carla would also work, since the latter is in a similar position, although a longtime vet, which people seem to forget.
Its funny that not too long from now, if things move quick, it's possible we could have Felice Herring as champ defending against Carla Esparaza. Never say never.