I think it is a bit early to say that the Lightning Network is having such a big impact on transaction volumes and transaction processing speed.
There will be eventually, but at this stage there isn't much noteworthy use happening. I read an article stating that even the Liquid side chain is helping to get the fees to go down, which is a straight lie.
Everyone can look into how much use the Liquid side chain is generating, and there is nothing happening over there. It has been 99.99% empty since it went live and there is not much indicating that it will change.
By the time Schnorr is being utilized, the fees will drop even further so expect more discounts.
Is there any way to know when Schnorr will be rolled out? I tried to find a specific date but didn't manage to find more than 'somewhere in 2019 if things go according to plan', which could even mean that it will be 2020....