Kraul Harpooner would be a weird card to board in against Selesnya, because the only target is Lyra (and Shalai, if they're on that version, but it seems nobody is playing Shalai anymore). Crushing Canopy makes more sense since it can also hit History of Benalia, Conclave Tribunal and possibly Ixalan's Binding; however it still seems quite narrow to me. If I'm playing Simic Nexus for example, I'd be leery of boarding in Crushing Canopy in this matchup. Collision//Colossus ... I suppose that's a possibility, haven't played enough of the matchup to know how it goes though.
One thing I like about Selesnya is that the plays come to me very naturally
I don't understand why, but watching Seth Manfield play the deck (
http://magic.tcgplayer.com/db/article.a ... =3-15-2019) my feeling is that not only did I spot the best lines faster than him, I think he didn't actually spot them at all. For example at 20 minutes in, my immediate thought was to play Trostani, then use Trostani + 2 tokens + Emmara to convoke Conclave Tribunal on Vivien. That leaves two 2/2 lifelinkers (one made by Emmara) + Loxodon to block with, gets the planeswalker off the battlefield, and gives opponent one turn to topdeck something. Seth Manfield plays Trostani, attacks with Loxodon, and then convokes Conclave Tribunal, leaving a 1/4 and a 2/2 lifelink to block against three attackers - a much more dangerous line. This could also be why I find Temur Reclamation to be so bad. Maybe I'm just bad at it, and I dislike it because I'm comparing the deck to my experience with Selesnya last season, but the difference is simply because I play Selesnya a lot better than I play Temur Reclamation.
On the matchup against monored, I've had quite a lot of success against it now, but I'm also running the Thorn Lieutenant + Shalai version which greatly improves the matchup against monored. Shalai in particular is a complete house. Against control - shrug. It does feel like Adanto Vanguard isn't that good against control now anyway, because they're running Moment of Craving & Cry of the Carnarium, both of which get past indestructibility. I wonder what other players are doing about those cards, or if they just accept they're dead.
Theorycrafting, I see Thief of Sanity as a genuine issue. It didn't see much play previously, but now that it does, I wonder if people made space for Kraul Harpooners in the sideboard for this reason (they can also beat down the Esper opponent I guess, although they die to Cry of the Carnarium as well).