Remember: There is no "2 stroke ban".
There is an emissions limit/standard for outboards.
Whether a manufacturer meets that emissions standard with a 2 stroke or 4 stroke design is their choice.
If 2 stroke technology (like the Etec) meets it, and the market demands 2 strokes, manufacturers will produce them.
But I think 'normal" 2 strokes are going the way of the coal-fired power plants: relatively inefficient, "dirty", 20th century technology that is being left behind.
Overall, I don't think we will see the quite the "relaxing" of regulations that is being expounded. Some reductions, some tweaking, some streamlining, yes. But not a whole-sale reduction.