It will keep going down until blocks are 1 MB and users can't transact freely and cheaply.
LN and SC are just vaporware.
Price ain't related to block size alone and covers many other factors such as user base, adoption, volume, news, etc...
You cannot decide the price of a coin based on mining factor alone...
By saying "cheaply", do you mean you want fee lesser than 0.0002 BTC per transaction???