here's some heresy for ya. forget about adding any more managerial responsibility to the home office, even if Berkshire is famously decentralized.
Berkshire should buy Berkshire, and not mess around.
IPO 10% of BNSF and Berkshire Energy to increase the "public" portfolio by $130-$140 billion and put a more verifiable value on these.
Blow out of KHC at a 50% discount and lose $16 billion for tax purposes
Blow out of AAPL at market
Cash +$15 billion (IPO) + $4 billion (KHC) +$51 Billion = $70 billion
$122 billion at quarter end plus $70 billion from selling KHC, AAPL, and taking minority stakes in BNSF and BE public. = $190 billion pro-forma cash.
Tender for 27% of company ($150 billion) of stock at a 10% premium and highlight how freaking cheap and overcapitalized the company is, then we can talk about bringing more companies under the umbrella.
Use all cash flow to retire stock until the market assigns a proper value to Berkshire.