Block size is effectively infinite right now because they are nowhere near being full to the 500KB soft limit.

Empirical evidence is preferred over theoretical chains of cause and effect, and this shows a steady long-term increase in fees already. The chart below is in BTC, ignoring the USD equivalent one...
https://blockchain.info/charts/transaction-fees?showDataPoints=false×pan=&show_header=true&daysAverageString=7&scale=0&address=

What is being done in the field to increase fees, right now, is WORKING.

All that needs to happen is allow the 1MB to be replaced by a capping algorithm which just keeps pace ahead of demand. Then see what happens to fees. If they plateau at too low a level - then try to fix it. Why fix something which is not broken (except the need to avoid the sudden train wreck due to an arbitrary constant).