FIRST PARAGRAPH EDIT: I kinda get your frustration. But also I'm sure its like this in other Clans too. The Bloodname House politics, the Trials for genetic legacies. It can be found in those other Clans too. It just isn't AS visible, AS written about as it is for the Mandrills. That's probably a big part of why I actually find them interesting at this point. I've always found the Bloodname House politics stuff interesting. For the Mandrills, that's on full display, warts and all. With canon sources. I'd sometimes love to have this level of depth and detail with the other Clans and for the most part we just don't.
Love your consolidation of the data, nice work there. I'm saving that for my notes. The only hole I can poke in it is that Samantha Kline is said to be the most popular leader to come along in decades. (FM: CC, Kline Officers page)
So I don't think Kindraa Kline came into existence post-Revival. Decades at least, maybe the entire history book. Not confirmed for sure, but that's where I tilt on that one.
Aside from that, it makes sense. I also agree that there is a distinct possibility that the Kindraa getting 2 warships a-piece may have been Beyl and Kreese, two aerospace-centric Kindraa. Which saw value in the idea of merging with a ground-focused Kindraa at some point to diversify their forces and allow them to hold ground. That makes a lot of sense to me. Their longstanding rivalry may have even compelled it to some degree. One might have done it, then the other didn't want to be outdone.
Also on FM: CC page 44, it displays Kindraa Mick-Kreese's name as: Kindraa Mick-Kreese (Goulet).
That same paragraph says that at times Goulet has risen to prominence in that Kindraa. Quote: "though with the recent capture of Goulet Bloodnamed warriors and genetic material by Kindraa Mattila-Carrol, the resurgence of this Bloodname may be long in coming."
I think Goulet was a separate Kindraa that was recently absorbed, in fairly recent memory as of 3059, with some Goulet bloodheritages/warriors within Mick-Kreese as well as Kline (there is a Goulet Star Colonel there in FM: CC but the Cluster he commands is a mix of elementals and conventional infantry, including some solahma, so this may be a fading warrior on the tail end of their career). But this event very much weakened the Goulets as a Bloodname House.
It's tempting to say the Goulets were perhaps the small Warden Kindraa decimated by Sainze during the Warden/Crusader split pre-Revival. With their absorption by Mattila-Carrol coming later as the survivors just didn't have the strength to remain an independent Kindraa. That whole dynamic left the Goulets in Kindraa Mick-Kreese in the best position to hold some kind of junior leadership position in that Kindraa. Also, a history of sometimes having a leadership role in that Kindraa.