That might work for smaller battles where each person matters, but in larger battles it is a better strategy to fight for you multi's by slight armor crutching and then get as much as you can out of the x5 while it last. Plus, some builds do worse with more armor, and many items' prices do not correlate to their effectiveness in any given battle. This applies less when you are clanning though.
I'd rather the option to pick different loadouts from the troop selection menu, and turn the useless faction menu into char selection.