ok, the destroids seen in Zero are going to be the Prototypes for the ones later on down the road ( SW1)
so to put in in English, Zero takes place in '08 and SW1 takes place in 2010, so therefore the new destroids are actually the "old" destroids.
Not quite. I know I said I'd never do this, but look at the Compendium, and I quote for the Tomahawk:
As you say, this is 2008. That means that this Destroid was in use by 2007, a full year before 2008.
To me, this finally nails the coffin on any hope of continuity for Macross. Macross Zero has new designs for everything, regardless.