Finally, we’ll be removing both Promote and Surge. We’re creating an item with an effect like Promote since it makes sense as a strategic option, and having it as a buy-in strategy means we’ll be able to better balance the effect in relation to its gold cost. Surge is being removed because it isn’t always clear when to use it or which champions benefit from it. In the end, Surge is a competing spell in a niche we’d like Ignite to fill.
In the preseason we want summoner spells to be another way to customize your champion to suit your playstyle instead of being dominated by a few, extremely strong choices. We’re confident that these modifications will free you up to experiment with different combinations and tailored to your favorite champions.
I understand that fixing and balancing the underutilized summoner spells will help people use them more, and I even understand removing promote if an item will be able to do it(gosh I hope it's a good support item!) but removing Surge?? It's very clear who to use this spell on: AP+AS character builds, like Vorpal-Spikes Cho'Gath, Tanky AS Nasus, Just about any AP/on-hit hybrid(why would Teemo take Ignite over Surge anyway?), etc.
I get that you're trying to encourage people to keep using ignite when it's getting nerfed, but doesn't all of this go against your stated thesis of trying to encourage diverse selection of summoner-spells? Ignite WILL NOT fill in for Surge because they are really not the same at all! If anything the new Exhaust will be what these sort of builds take.
I wonder if it came up that Surge is a great spell on Dominion or if this decision was made based on it's general non-use on Summoners Rift? The reason for that is that more diverse play-styles work on Dominion, and since you are trying to encourage that in Summoner's Rift, it seems like this patch would be the one to finally give Surge the respect that it deserves! Instead... removal? This seems like a big mistake to me...