I play PHC against AI Substrate in skirmish. My dreadnoughts are idiotically bad in groups. Whether or not I form an army with them, and even though I right-click constantly on an enemy dread, usually only one of them will shoot at it. Often not even that as my dreads *always* prefer small fry and can't be redirected from those.
And the one that is shooting must constantly be forced to do that, or it will often just turn away! No other units behave like this.
As a result, the single enemy dread will knock mine out one after another, because most of them are not even firing.
Devs - try it! Should be simple enough.
This also shows up in dreads attacking buildings and is a long-standing issue. I've seen it reported before and I have always just dealt with it. But I'm very tired of doing that. It's a major bug that needs attention before we worry about naval units etc.
[If you do locate the source code after all this time, maybe you can also fix replay crashes.]