Not sure it's ever been particularly difficult to be a criminal. If anything, the tricky part has always been establishing who you can and can't trust.
What are you talking about? Thieves' cant, burner phone, clandestine meetings--these are all things that make crime easier, and none of them are illegal. We ban crime, not things that allow crime.
How is it complicated? Having to do these things made crime difficult. There's higher barrier to entry and cost to pay. It's more difficult to scale across borders. Not having to do them makes it easier.
The internet makes crime easier; should we ban it too? Before cars, you could only steal what you could carry--maybe we should abolish cars too. "Barrier to entry for crime" is not a useful metric, because it encompasses so many things.