Is this good or bad?
Good because:
1. Assad was an evil human being
2. The Assad regime was aligned with Iran and Hezbollah, with it gone, Iran can't easily transfer weapons to Hezbollah
3. There are some rebel groups that might be friendly to Israel
Bad because some of the rebel groups in Syria (HTS, ISIS, and others) are Sunni Islamists that could threaten Israel's border with Syria.