I agree, as well. Please submit this suggestion to Apple Feedback.
Here's what I just submitted:
I would like to submit a request for you to add an option to skip a 3rd party's App updates so there will not always be a notification to update on the App Store icon. Many times updates to apps don't run as smoothly and occasionally they add functions end users are not interested in. Other times updates will cause buggier operation than previous and developers are not always forthcoming with bug fixes. But I believe the most important reason there is a need for an option to skip app updates is that not everyone is on, nor do they wish to update to the latest version of the firmware. For example, for months I was content with running 2.0 OS with no adverse results and the apps I downloaded ran smoothly, whereas after the 2.2.1 update, many of these apps changed drastically, no longer offering the same type of service or playability. Please seriously consider implementing this option.