How detailed I am, depends on what I find. For example if the only problem is a single reverse polarity outlet, I’m very specific as to it’s location, define it as a minor defect and reccomend that it be repaired. And it would be acceptable for an electrician to use my comment as an estimate for that.
On the other hand, if I find numerous issues as you did, I would call it out - more or less as your paragraph above is written. It would be a list of issues (and limitations), with a recommendation for an electrician to fully evaluate and give an estimate of repair costs. I would even include an comment on the lines of “Because of the extent and volume of the defects found, it is conceivable that there are other latent defects not apparent in a non-invasive visual examination. Therefore I reccomend that the entire electrical system be re-evaluated by a qualified electrical contractor for full repair recommendation and estimate of repair costs.” BTW if the electrician is using my report to do the estimate, I wouldn’t give them the time of day. They need to LOOK at the system and do the estimate on their own.
If it’s a single issue, I call it as being wrong and reccomend repair. If it’s more of a “system” issue, as you have described, I call it out for a specialist to look at it.
As an analogy, your General Practitioner can tell you that you need a tetanus shot. He shouldn’t tell you, that you need a heart transplant. If he suspects that, he should send you to a cardiologist for his evaluation. Neither should he be telling the cardiologist how to do that transplant.