I've abandoned that for mempool.space and one of the things that made me do to were exactly the fluctuations, it shows way better the incoming transactions for the last two hours if there is no huge spike in them and they are all around the median capacity you know that there is the risk of binance or some other big exchange dumping half a block worth of transactions just about now. On the other hand, if you see that there have been two or three of those spikes reaching 7-10k vb/s  you know that at least for a few hours there is little chance of another set of waves hitting the mempool.

But that is just for the mempool stats, their estimator is also pretty inaccurate, it takes into account the median fee for the next block, and since right now at block 689888 somebody has sent a 2875 sat/b the estimate is complete bs.