Like the title says. How to I restore the tariffs to pre-1.4 levels, with all overseas provinces giving it, instead of production income?
Why would you want to do that, aside from the obvious fact that national ideas that give bonuses to tariffs are completely useless if you bypass the new colonial mechanics? Those bonuses are hardly significant IMO, just there for flavor really.
Just use the trick in steam to revert to the old version. I don't really remember about it but it was posted by the devs in bug fixes. It might be stickied there, or somebody will post the link here...
In static_modifiers -> overseas reduce local_production_efficiency = -1.0 to -0.8. Tariff ideas etc. would need to be changed too to be completely 1.3-like.
Edit: Not a complete fix of course. Tariffs were 80% of production, but modifiers didn't change that.
That would just boost production income, while tariffs income would still be non-existent.