well more than rushed i would say that the pace was just kicked into high gear you know, instead of filler book filler book, important plot, filler book it was something huge something huge something huge book after book and it set this really frantic pace that really did feel rushed but, for me anyway, rushed in a good way, because in the story, the animorphs were rushed
would you have preferred there to be another 5 books with random missions after the animorphs had been found out and open war had been started?....yea.....well... .me too, it would have been extremely cool lol but it would have really thrown off the pace of the final arc you know, after say 46 (with the exeption of 48 wtf) you get the feeling that this is it, the animorphs dont have time to look into the yeerks experimenting on donkeys at some dude ranch, and the yeerks arent wasting any time with any of those end the invasion quick schemes that filled in the series so well.
Its all out war, the only things that were important were gaining allies and destroying the oponent, which is what the books focused completely on after 49