I think the grind times are perfect now. The only thing is lack of content and we all now know that was due to the inefficiency of the game engine they created which made it take months for minor expansions. It's the sole reason they had to cut the game apart and sell it as expansions. That is why they created a new game engine for Destiny 2 which should allow for more content with a faster turn around on new content. If destiny 2 has more content, the grind level is fine as it is.