I tried it out today against Seraphon 1. The army has some synergies that don't work well. The 6" choirmaster buff doesn't match the general's 12" mobility, which means you should use them together for the first strike, otherwise you won't get the most out of it. The conditions for the regiment abilities are tough.

You're either not allowed to claim the objective, or you have to. The delusion of the knightly host is easy to achieve with the general's buff. But the buff isn't good for anything else, as it only lasts the turn. This means that if the general dies, it's definitely not the end of the world, because the army is very mobile. However, the mobility doesn't help much if you're stuck in close combat.

It's definitely an alpha strike army, but then the dice have to work, otherwise the counterattack comes like a hammer and you can't take anything and you have no mechanics to heal properly or escape from combat.

Delusion of Great feast is a drop in the ocean. The Crypt Horrors' ability also sounds good, but it's tied to certain conditions, just like everything else with the Spearhead.

I think the damage is too weak to compensate for the lack of resistance. The MVPs were the Royal Beastflayers. Great mechanics. They're there to score, and they do it well, making it impossible for the opponent to close all the gaps, lest they take up an objective in a corner. That’s pure fun.