My name's Shweta and I'm a Product Manager working on improving Jira's email notification experience. As a part of that, we had rolled out the new batched experience (https://confluence.atlassian.com/jirasoftwarecloud/blog/2019/02/jira-emails-are-changing?_ga=2.173668899.1017345967.1562555521-706473354.1537750122) - to reduce the number of emails you get.
Our team is currently working through providing notification settings to all users. We've already gotten a bunch of awesome responses the surveys and feedback we've asked through this issue. The good news is we have our first version of that ready to be tested.
If you have some time, it'll be great if you can test out the first settings we've built out. It's still in Beta and your feedback can help improve it further. You can sign up for the Beta here - https://forms.gle/g6Qqt3dkC7eMB1mA8
Please let me know if you have any questions or concerns.