Question: is pithy good or bad?
Answer: 'Pithy' meaning 'short'/'concise', is perfectly appropriate, as in a 'pithy saying' [i.e. 'Haste makes for waste. ']. The pith is the substance at the heart of a stem or branch, so therefore the heart of the matter, the central point, the gist. A pithy statement is one that gets right to the heart of the matter.