I love this! I'd be very excited to play it.
My only concern is that having all your pets, even the most low-level, able to create "pets" of their own will make for a wildly cluttered battlefield, plus server strain - if you have three simulacrums two duplicates and a perfect copy each doing sudden mob, plus 10 minor copies, that's, what, more than 50 total copies of you at once? The way you have it set up, the lower level pets get duplicating powers but the highest level pet is focused on your secondaries; it might be better to do it the other way around, so that low-level pets get secondaries and only your perfect copy and maybe a tier 3 duplicate can use duplicating powers. That reflects the way this powerset appears in fiction better, as well.
Other than that concern, as I said, this sounds awesome!