no offense, CC, but Adriana is in no way comparable to Heidi, Tyra or Gisele. Heidi and Tyra have both hosted the EMMY Awards, as well as numerous other awards shows. they've been on tv shows and in movies and have been on countless entertainment shows, talk shows, etc. Gisele is the most commercially successful model in the history of the profession and she's had more covers than ANY of the previous supers (including Cindy, Claudia, Naomi, Tyra, Kate, etc) she's in a league of her own and to compare Adriana to any of them is just your fandom talking.
i will agree with you that Karen and Daniela weren't on the same level of fame as Stephanie, Tyra or Helena. i think most of the general public who were at least remotely aware of celebrities in general, would have known those 3. (like EVERYBODY knew Cindy Crawford and Claudia Schiffer, who were really THE 2 biggest names of the time. even my father, who's entirely unaware of anything to do with fashion or celebrities knows their names)
but Karen and Daniela at the time would be comparable in fame and status to Adriana and Alessandra today. the only difference is that they were the LEAST famous of the Angels back then and there were 3 proper Supermodels to rep the brand, whereas today Adriana and Ale (and probably Marisa is even more famous -- in America at least -- than them) are the MOST famous and there aren't any other proper Supermodels to rep the brand (aside from Heidi, which is why she gets so much attention -- but as you mentioned, she's really more of a spokesperson for VS than an actual catalogue model at this point). the problem isn't with Adriana or Ale -- they're both incredibly gorgeous and wonderful and have been tremendous assets to the company, i'm sure.
the thing is, there simply AREN'T ANY Supermodels famous enough at this time to do the job right. they just don't exist. not Daria or Karolina or Natalia or Gemma or Natasha or any of the current Angels.
maybe, just maybe Doutzen and Miranda have a chance. Doutzen has a respected HF career and Miranda has a moviestar boyfriend. only time will tell.