It was rather clear during the Showcase that aerial movement and combat are a significant part of Strand through the Grapple ability, and I doubt it is a coincidence that Aerial Effectiveness changes were made with it on the way. I even suspect that the Elemental Capacitor Strand perk will be tied to Aerial Effectiveness. The newer discussions about improving Aerial Effectiveness for primary weapons in Season 19, and the seemingly arbitrary addition of 80 AE to Heavy Snipers like DARCI and Whisper, have only made me more certain of this being the case. If it is their intent, Bungie needs to make sure AE is the best it can be. Otherwise, it might end up hurting Strand's reception at launch, because I don't imagine people will react well if aerial gunplay with Strand turns out to be hampered by AE's flaws.