Some things that a future software upgrade for the HP Prime should consider are the following. They are confusing, and more so from an educational point of view.

Logarithms behave differently in Home and CAS. CAS computes logarithms of negative numbers, while Home returns an error. Besides, the [LOG] key in CAS puts log10 on the input line, but typing LOG on the input line in CAS stays as LOG. In Home, LOG is LOG.

For negative numbers, nth root sign in CAS is different from 1/n power. In Home, the behavior is also different. The command HELP does not fully explain the different behavior, and the example provided in HELP seems wrong for the Help description.