I guess it all depends on the use the network will have. Right now we have low fees again, because there are no spam attacks going, and most users don't really do anything with their coins. The fees problem was greatly caused by exchanges like coinbase and gemini, but they seem to be finally correcting the problem by adoptiing segwit and batching their transactions.
I dont think the current fee decrease is due to exchanges adopting Segwit and batching transactions.
1) Segwit adoption has not increased.
http://segwit.party/charts/2) Num transactions has been going down but transaction value is also going down.
https://blockchain.info/charts/estimated-transaction-volumeIf more transactions were batches shouldn t transaction value being going up?
I believe its just lower transaction volume.