Level2 websocket channel too verbose!?

In relation to this topic, I compared data size between Pro and Advanced Trade for BTC-USD

Snapshot message in Pro is ~0.63mb while in Advanced Trade it is ~2.46mb. That is almost 4 times more data!

Update message in Pro is ~0.000155mb while in Advanced Trade it is from ~0.00267100mb to ~0.03103600mb. That is 17 - 200 times more. But I guess this is not fair comparison as it looks like Advanced Trade is grouping updates…

Anyway that does not look good to me at all! Are there planned improvements?