Usually, your existing customers are the most impacted by pricing and packaging changes – so you may need to focus on communicating any updates clearly to your users. If all the changes are positive (e.g. they get more for the same) your job is much easier. If there are negative impacts, you need to diligently segment all your cohorts and identify how each group will be impacted, and then create a comms strategy from there. A blog explaining the changes and customized emails to each group is how we have approached this before.