Skim through the major tenets of the PwC Stock$-$based compensation. In March $2016,$ the FASB issued Accounting Standards Update $($ASU$)2016-09,$ Compensation$$Stock Compensation $($Topic $718)$: Improvements to Employee Share$-$Based Payment Accounting, which amends ASC $718.$ What are a few of the improvements to employee share$-$based payment accounting discussed in the report?