When did this happen? Please explain how to use 5 tuners for recording and 3 for simultaneous streaming (your scenario implies 10 tuners). That capability is not listed anywhere. Unless there is something I wasn't told, the limit is 5 tuners for streaming and viewing total (plus 1 download). Max of 3 streams + 2 recordings = 5 (implies you cannot watch anything else while recording, except a show being recorded).
If this is true, then I've got some great news for some people. They won't believe me, but it's pretty awesome. If it's true, you'd think DirecTV would have made it very clear on the website and marketing materials.
I think you misunderstand.
In your situation with no minis the tuners will never be accessed by anything other than the genie itself.
You will only ever be watching recordings on the other units. It can allow for up to three recordings to be streamed to other devices at any one time. It has nothing to do with the five tuners.
And since you can watch a recorded program on the hr44 as well while it's recording five other things and because it can download something on demand at any time as well you can have 10 things happening at once. But it's still only using five tuners.