
You've raised some valid points here as all too often people don't get the support they need at this time of great change when they are leaving the known and comfortable and stepping into a new position. Promotion can be a double edged sword.
Your blog raised another point for me ....about when someone is fabulous at what they do and then they're 'encouraged' into promotion either through the business actively promoting them or the individual doesn't feel appreciated and seeks promotion in order to be recognised. Generally they've been fabulous because they love what they do and it's infectious - (favourite teacher, best boss etc). and then when they move into the higher role they don't perform as expected.