Yes...it's a crappy drawing and vague description...
...but based on what I could make out, it looks like you have some decent space to work with, and if your foundation problems are 100% behind you...then go to town with the studio rebuild. I think you have several ways you can go.
Do you really feel the need to break it up into all those smaller isolation rooms?
Hey...you know best the kind of work you usually do, and what kind of plans you have for future work once it's rebuilt...so if that's what works for you..it doesn't look like a bad plan. it's all about what you prefer.
For me...I'm a space junkie...
...I mean, I would love having one decent isolated room for whatever...but I'm not sure I would ever need that many separate isolation rooms to be used at the same time.
IOW...f you have a band, maybe you isolate the drums...but then I (and that's just me) would rather have the guitars and the rest of the band in a bigger open room, and then break that up with gobos and such.
Likewise....in most cases, the lead vocals would be done later, as an overdub, in the same one iso rooom...so I guess I just don't see simultaneously needing to put the vocalist in one room, the drummer in another, the guitar in a third room..etc.
More open space to me is also a nicer vibe, rather than everyone compartmentalized and sealed off.
One nice isolation room for when it's needed...but a wide open control/mix room, where you can also record in, and everyone is there, mixing it up...making eye contact...etc.
Like I said...that's just me.
You know your situation best, and your prefs...so go with your gut...and good luck, I'm sure with that space, no matter how you lay it out, it will be a fantastic recording studio.