I don't think it's that complicated to adapt to... everyone should just be pretty much constantly ferrying out regen and harass more aggressively.
Courier isn't that important. It's being phased out across the recant patches. And there is a popular Dota mod with 5 fast invulnerable couriers.
Yes there is Turbo, no it's not comparable to regular gameplay.
So maybe playing without a courier at all would be more representative of the pub experience ;)