This might not be original idea, but did not see poll about it.
What if we got rid of this old "solo vs group play" dilemma forever?
Simple solution would be in my opinion that we just separated progression from those 2. Meaning, there would be different set of legendary gems and paragons for each category. But would this be too much? Not saying this would make all things better, but it would end the dilemma what we have. What do you think?
This would be fair for all. You would not need to play high end 4man to be competitive in solo play. Extra confusion, sure. Would it fix it, yes.