Moving to Cloud is by far going to be the best decision you've ever made. Why? Because it provides robust features, an Administrative and hassle free environment and you can now create sandbox environment to test those Production configurations and compatibility without the hassle of creating the Instance yourself. Please note that sandbox is only available on Premium or Enterprise plans.
Once you're done with all the configurations and test, you can simply just delete the sandbox environment and all the data within. Atlassian has made it easy that even upon deletion, you're given a waiting period of 24 hours just incase you change your mind to stop the scheduled deletion. I love this feature and I'm very certain a lot of users out there will love it as well.