Poison Heal is equally viable on AcroBat. You don't actually have to go and actively abuse the ability (switching into Toxic) to take advantage of it. Isn't the perk of being immune to Toxic not attractive enough? It can just be a fail-safe right there. I guess Hyper Cutter is pretty good because Intimidate is common enough, and blocking that is pretty important.
In addition, in my experience Salamence doesn't switch into Gliscor anyway very often, potentially because Gliscor often packs ice fang, and it struggles to beat Gliscor anyway.
Just to quickly address this point, every time I use MixMence with Intimidate I'd generally switch into Gliscor. Ice Fang from defensive Gliscor does absolutely jack shit after an Intimidate (~45%, which is just pitiful for a 4x effective attack), while you can just Draco Meteor the Gliscor to high heaven.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.