My break down is 3 hours circuit solo consolidation, followed by 1 1/2- 1 3/4 solo local consolidation, before any nav is taught other than dep. and rejoins, local area map reading. Served me and my students well for last 30 years.
If you think the weather is good enough to teach nav. then it's good enough for local solo's before any nav. is taught.
Too many instructors to keen to send students solo nav., earning cash, sitting on their arse.
The CFI should not expect other instructors to have a working plan, have a standardisation meeting.
Got to admit i am guilty of not doing this and just assuming other instructors know what they are doing.
And of course some instructor don't have confidence to send student solo.