I saw some lists on a forum, from a local AoS tournament. They looked quite awesome, and probably quite difficult for similar ones to play in 8th edition. Just to give you an idea, there was a list with 15+(!) blood Knights, 10(!!) tomb king chariots-- do i have to say more?(ouch), another one with 26(!) chaos warriors, Hellcannon, etc, and another with 15 chaos knights, 3 chariots (they seem a few compared to the above, don't they?) and some more things...
IMO, they could even put a Sigmarine army to shame.
How do you even make it to the 3rd round against more than 15 Blood/Chaos Knights?!! Are State Troops or Empire Knights still a valid choice for AoS? I'm lucky enough to own Valten on horse, but is he worth it to include a unit of Knights?
Unfortunately, the Sudden Death objectives, which at first i found a good idea to even the odds... now i think they can easily backfire spectacularly, putting you in an even worse position, and as such contributing to greater imbalance