The scariest thing about how good Maradona was is the fact that he still might be the consensus greatest footballer ever despite playing in the roughest era of football ever, and in the most defensively inclined league.
Leave aside the fact that many of the tackles that he would find himself on the receiving end of would be automatic red cards in today's game. The very threat of those tackles was a detterent to many strikers. In the back of their minds, the thought of a defender lunging at them with studs was always there because the defenders could do that with impunity. As such, there's a natural trepidation ingrained in attacking players that would attentuate their offensive aggressiveness.
For those who champion Messi (or anyone else from the modern era) as a greater player, consider the fact that the modern players know they can't be touched. Defenders get sent off for anything that is remotely violent and as such, attacking players could play direct and aggressive all the time, without worrying ahout tackles.
In a sense, today's players are kickboxers fighting MMA fighters under kickboxing rules. They would feel comfortable walking down their MMA opponents as the rules check the takedown threat. They're boxers fighting others with no knockout threat and can stay on the inside instead. It changes the nature of the sport.
Formation changes and offensive dispositions in the modern game are one thing, but the rules are the biggest factor in changing the way the sport is played. Maradona played back when the sport was a defensive grindfest. He played played on some of the worst pitches ever and was on the receiving end of some of the worst tackles ever, and despite that, is still considered by many the greatest footballer ever.
How much greater would he be viewed had he had less opppressive conditions and better pitches, balls, equipment?