tf_airblast_cray 0 for old airblast
ctrl + f tf_airblast here if you want to find related cvars
edit: jk it's apparently funny rounding very cool
funny enough tf_airblast_cray_stun_duration defaults to 0 in game but you definitely can't strafe after being airblasted so it's probably bugged as per usual. tf_airblast_cray_lose_footing_duration defaults to 0 as well but you also glide along the ground without being able to strafe so...