No my point about the trinket is the effect Trinkets is the effect they have on the jungler's ability to apply map pressure due to the increased vision. Which greatly reduces the value of a jungler.
Also tried the Double Brace strat with two botlanes with my brother; Nami+Trist [We did OK; but we kinda kept getting 4 man ganked with no mia's because the rest of the team fed]; and then Sivir + Annie.
I had a BF Sword at 7 minutes in the Sivir/Annie game. I had a full build worth about 21k [I had to buy a Mercurial due to a fed Malzahar; as well as an IE last item] at 40.
I don't think you get enough gold to justify duo top; not in the slightest; but it's certainly stupid botlane; especially with characters such as Annie. [Annie had a full build of cheap items at 30 mins because she didn't expect THIS MUCH MONEY; so proceeded to start selling cheaper items for more expensive ones]
But the amount of gold isn't more than what a farming jungler would be getting. Effectively the support gets 2 creeps per wave; or 4 per min. About 100 gold. A farming jungler doing full clears every 50 seconds with a Wriggles gets more gold every minute than a laner achieving perfect CS.
Plus a lot of your argument of merit for duo top is it would shut out the enemy top. But that's not true; because such a strat would be easily seen coming by the lack of a jungler. Pick a jungler such as Nautilus with really strong C.C who likes the new jungle [Nautilus loves new Golem; and even Wriggles with Titan's Wrath] and you can shut down the 2 enemy laners; since you'll have more levels and Nautilus will be far richer than the 'support'.
Toplaners have been dealing with 2v1's all season. Never seemed to shut down Renekton and co. I've seen 2v1's backfire quite a lot too; thanks to junglers and the fact 2v1's naturally shove.
Or you just take a character who's more utility and won't die easily while still getting SOME farm [Lulu and Janna come to mind here; especially as they can go Shurelia's path] and put them top; and pick a jungler like Shyvana and go nuts; get more gold than the laners; and outscale that way.
EDIT:
GUYS A STAR JUST APPEARED ON MY GAME SELECT SCREEN AND THIS APPEARED