Does anyone know where I can submit a new BIP proposal?

It is BIP69 and it follows a 3.50-69-420 plan

Immediate increase up to 3.50 on the first of the month

Followed by increase to 69MB at the third block reward halving in ~2020

Then increase to final cap of 420MB at fourth block reward halving in 2024


BIP69 is aggressive, but we can all agree it is obviously the best plan.