To say "if you're a true Aerosmith fan you wouldn't complain" is nonsense. Being a fan doesn't mean you have to blindly follow when your heroes get it wrong.
Why do we need another compilation of the same songs that were on the last three greatest hits CDs? Maybe they don't have the time/energy/enthusiasm to make a brand new record right now. That's fine. They've been doing this for nearly 40 years. They're entitled to only make albums when they feel like it after that long.
But filling the space between albums with cash cows like this is a real slap in the face for the fans.
Why not release a b-sides and rarities comilation instead? There are several live b-sides from various singles over the years that are no longer available, plus all the studio rare tracks: What Kind of Love Are You On, Animal Crackers, Head First, Don't Stop, Fall Together, Angel's Eyes, Blind Man, Deuces Are Wild, Girls of Summer, Devil's Got a New Disguise, Sedona Sunrise, Come Together, Lay It Down, Walk On Water, Love Me Two Times, Lizard Love, Ain't Enough, Won't Let You Down... the list goes on.
A compilation of this kind would be so much better received by the fans than yet another recycling of the songs they already have several times over.
There's also the issue of one of the biggest rock bands of all time still not having a real top-drawer live DVD available... that could surely be dealt with as well!