I will volunteer to help test. I am sending you a PM Joly. Grats on the win.
I think it is a bit complicated. Having 8 cards in your sideboard dedicated to beating Esper does sound a little silly. If you build a superfriends deck that is completely dedicated to beating control it isn't superfriends any longer.
Basically, you would have a 4 color goodstuff deck with little removal. Due to mana issues inherent to a 4 color deck your tempo would still be slow as molasses. You can't really curve out. You are just more likely to be able to exhaust the Esper player's hand of removal and then hope he gets mana flooded at some point.
My prediction is that Esper would go from being strongly favored against your version of removal-heavy superfriends to still somewhat favored. Esper has card advantage plays you can do nothing about.
Confirm Suspicions,
Comparative Analysis, plus planeswalkers and wipes will all give Esper and advantage, and you can't interact with any of these except planeswalkers. Meanwhile, you have card advantage too, but it is all vulnerable to counterspells.
My deck is almost completely creatureless. Game 1, you will get punished for having removal. But if you board out all your removal for game 2 you may face additional problems. Boarding out all of your removal is the most common response to facing control. This makes it very attractive for me to board in some more creatures... who are suddenly completely dominant facing a deck with no removal.
Archangel Avacyn,
Kalitas, Traitor of Ghet,
Ulamog, the Ceaseless Hunger are all game-winners. You get
Gaea's Revenge but mostly you are adding in 2nd tier threats.
Rise from the Tides is another finisher that is simply too risky in a meta with board wipes and declaration, but once you board them out it can overwhelm you and seal the game quickly.
I will say that I think superfriends will benefit more from sideboarding overall, but we are talking 5-10% more wins.