As far as Esper goes in modern, I'm currently on a more midrange/control type list that feels a lot like a rock deck, and it served me well through Eldrazi winter and so far beyond as well. The deck doesn't play any of the gross counterspells in modern outside of 2x Negate in the main to shore up fast combo matchups.
I don't think that anyone can afford to be purely reactive in modern, because the format is too fast and too open and the answers just aren't as fast and versatile. Sitting back on a pile of mediocre counterspells and wraths is a good way to get killed, so I've opted for pressure + disruption. Otherwise it's an all-in tapout control grindhouse. I love this style of deck, and you get to play 4x of the best card in modern, Lingering Souls. Overall I like my current configuration a lot, but I'm not sold on my slots with Sorin, Solemn Visitor and Esper Charm. Looking for suggestions/advice there. I'm considering just maindecking one or both of the Damnations out of the side, but I'm really looking for ideas here. I've opted for Damnation over Supreme Verdict because of the strain that Liliana of the Veil puts on my manabase. I'm pretty heavily base black, so it just made more sense I think. Hit me up with questions, comments, and advice!