Thanks for creating this Arunoda! It's made tracking down bottlenecks in Meteor very easy. We were a bit concerned about how Meteor was going perform under load, but haven't run into any major issues so far.
Using Modulus.io, so haven't been able to enable oplog yet, but performance is still pretty decent. Several thousand active subscriptions on modest server without any issues whatsoever.
We'll show you any potential issues and stay in touch with the app.