Note that so far if you fly on a USA airline this ruling does not apply.
To the OP: everything in your statement depends on the meaning of the words "most professional, least compromised". These terms don't have any sort of generally accepted definitions -- for some, it would be nothing short of a 100 megapixel medium format digital system costing six figures, and yeah, you're not getting a redundant full system in a carry-on bag, let alone the required tripod. For other photographers, the smaller "mirrorless" systems provide professional level results, and it's relatively easy to get a complete and redundant system into a small carry-on. (I've not yet had my camera bag with this kit weighed at the counter. If they insist on weighing it at check in, just pull out a camera and a lens and sling it over a shoulder to reduce the bag weight.)