Functionality missing in Membership plugin

I have one subscription plan that has an initial member level that is a single paypal payment and then falls through to the next level after a certain period of time at no extra cost and so on and so forth . I would like to be able to ping the user not just on joining a subscription (set in the Subscription plan page) but when his membership level changes. My users aren’t changing subscriptions or making multiple payments they pay one time at the first member level in a subscription and then fall through additional levels over time. They need to be notified of their current status, just as the admin is in the newsstream.php, which is recording the level changes… please give me another option to ping on member level change. it would be more helpful if the communications emails could be sent on level changes but they don’t – only on subscription changes, and as said above, my users are on a single subscription