ive never left aluminums, other than some woodies, thats all i shoot, i have never had a reason to follow the carbon craze. you mentioned they were easy to bend, ive never experienced that but shoot fairly thick walled shafts 2216,2018, 2020 etc.. and you mentioned heavy.. heck yea another plus , you can have a 600 gr arrow with out adding a bunch of weights and such,but weight can be added if a really heavy arrow is desired. and to me they tune alot easier than what i see folks going through with thier carbons.
benifits to me are that they are tough, heavy,compared to carbon and have a wide range of spine weights, and are easy to work with,