With new change to overwatch happening at the end of movement phase, your mortals will go off before it gets overwatched, so you can technically destroy full flamer units with mass jackals and prevent getting overwatched totally.
You can take up to 33 Jackals (with alphus) and do avg 16.5 dmg with mortals before opponent can snap shoot at you. That's almost a full Land Raider destroyed in just movement phase.
Edit: Only 30 Jackals can do avg 15 dmg. You will still turn off Hellhound and Immolators.
It's better than Jump pack intercessor ability.
Then, you can enable reductus saboteurs and neophytes disembarking from a truck to slam into whatever came out of transport.
One vehicle unit with smoke can move up past your army and smoke all of them at once.
Maybe Outlander Claw will be strong!