That's not a bad idea.
But from a game design standpoint (one that IIRC has been commented on in the designs for TRO 3085) a what you just mentioned is a DW, slightly modified. (with ESC IS, and AES) I'm not sayign that it's bad, or not enough for me, but from a design standpoint you could basically just make that a DW and be done with it...
When I think of stock BT mechs, especially clan omni's, I need differentiation in the units. and I suspect not just me. My Suspicion is that the designers want units that differ, not just simple pinnacles of Tech.
I mean, Frankly, the DW is about as optomized as a 100 clanner is gonna be. So what can you do to a 100 ton mech that fills a different niche?
I do like the idea of the AES. maybe placing that ina 4/6 LFE frame, with maxed integral DHS would give something different enough. You could light that sucker up with energy weapons, and it'd have plenty of crit space for more DHS.
I dunno. But if all that the clans are making is more of the same then that's not a reason to publish a mech, you know? At least not to me.