The only map stealing feature I think might work for EU3 of the one's from EU2 is the one you could get when boarding an enemy ship. This had a chance of giving you knowledge of a random province (perhaps just a random sea province?) that the other country knew by stealing their charts.
The stealing of maps upon the capture of the capital was removed even in EU2 patches due to it being too overpowered as I recall.
The stealing of maps upon the capture of the capital was removed even in EU2 patches due to it being too overpowered as I recall.