When using a bloodclaw starhost does the oldblood have to be your general? Also, if you have enough units within the bloodclaw starhost, can you include them in another warscroll battalion such as the sunclaw starhost?
Yeah, a unit cannot be part at the same time of two different battalions. i believe the only exception to this are things as Starbeast Constellation, which are an ensamble of various starhosts (so, the knights of the Firelance are also part of the Starbeast) About the Oldblood: he must be included, but that's it. You can have a Slann general
On the topic of Bloodclaw, there still hasn't been an official response as to whether or not the "Strategic Mastery" ability uses the errata from the Starbeast Constellation or not, because as is, it does nothing. Considering the price of the battalion, I'd assume it was intended to, but it still needs an FAQ/errata. Is there a good way to to get an official answer to the question or to get it added to the FAQ/Errata? Or do they have an official e-mail or something for submitting questions?
Try emailing customer support I guess or spamming their facebook/twitter/whatever. They do seem to be respond with some frequency to these kinda questions on there.