Seems like echo issue is fixed for normal calls but still exists for VoIP(Whatsapp, etc.)
However, I found one person is saying that it is best update (no touch issue, no battery drain, good thermal control). This might depends on users since it is based on personal exprience but I just want to share there is some feedbacks like this. Screenshot_2019-06-02-09-30-47-041_com.android.browser.png