not taken away. Not from "Israel" (2 Chronicles 15:17), but from Judah (2 Chronicles 14:3). Figure of speech Palinodia. App-6.
perfect: i.e. so far as idolatry was concerned.
Related Commentaries of 2 Chronicles 15:17
2 Chronicles 15:17
17 But the high places were not taken away out of Israel: nevertheless the heart of Asa was perfect all his days.