Considering that a lot of supernatural(mixed with science) events has been going on lately in the pages of Amazing Spider-Man, Jessica, Tigra, and Peter more than qualified to work as allies. In my opinion, I feel that Greer Nelson should not had been made into Tigra(who should have been her own character from the start). As The Cat, Greer might had been a better fit as an ally/supporting character in Spider-Man's world. I never understood why Marvel allowed Greer to become Tigra in the first place? Both Greer and Tigra(the spirit that dwells in Greer's body) are really separate in personality and goals. There is so much potential for Greer to be a part of Spider-Man's world as a Police Office/Crime fighter as her story(as Greer Nelson) could be flushed out.
I view Greer Nelson as a lost opportunity to had been one of Spider-Man's close allies had Gerry Conway had brought her over into the pages of Amazing Spider-Man. She might had avoided being used as Tigra's new body..