I got to see them beat the E4! Took them a while once they got there, not helped by teleporting to New Bark Town from the league at least once, haha. It was pretty close too - I happened to switch it on midway through Koga, where their Espeon was sweeping. It then swept most of Bruno's team despite using Bite some times until it ran out of Psychic PP... and then it was a bit messy. KT the dragonair lost to Vileplume but Steelix took out Umbreon and Gengar, albeit falling to a Destiny Bond. Then the Pidgeot of the run beat the remaining of Karen's pokes, but took a beating (including a critical hit and missing with Fly...and Houndoom being healed with a Max Potion during Fly), so it had its HP in the red.
So the battle against lance was just down to Feraligatr in essense, who got thunder waved by a Dragonite. And Cut kept being used. :V But it tanked hits like a boss, until the last Pokémon, Aerodactyl. Feraligatr had 30-odd HP left. And Aerodactyl was the one thing that Pidgeot can't really hit, of course.
Feraligatr tanked a Hyper Beam with 6 HP left and OHKO'd with Icy Wind. :V
I like it when I have good timing and get to see stuff like that, haha.
As for the drop in viewers - well, no wonder. It's the second version, not the original phenomena which was brand new (and lasted over two weeks and had its fair share of frustrating parts - a day fighting a ledge? two days spinning in rocket hideout? Add crystal to that and no wonder viewers drop). And a lot of people would have only cared about the original run anyway. The social experiment was a success in beating an old Pokémon game, not everyone would care if it could be done again.
Not that thousands of viewers at any one time is anything to sniff at over the course of 9 days either. It's much less than 70,000 (and that wasn't the number all the time in the Red play either, let's not forget), but it's still rather substantial and indicative, at least to myself, that there's still quite the interest in this sort of play.
