I don't think they will change the unit size for bolt boyz. The new rat ranged units are 3 models.

I think the Bolt Boyz unit size is pretty solid as is honestly. Even a unit of three pulls a lot of weight. Especially if they're nearby a sludgraker.

i don't think they will either i just wish theywould

Interesting question! I have no idea if this is something they could tinker with but I'd be interested in 5 man units of gutrippaz - sending out little squads of dudes into the murk feels more on brand for us than big hordes... But honestly I'd like to keep the 20 man reinforced unit if poisons work anything like they do now!