I dont need to see hard numbers, I can clearly see it in Dattos run on court of oryx. I can read it in todays patch notes.Not in the context with which he was speaking. The difference in dmg between 29 and 30 was 30%. Thats pretty significant considering when I played there was only 4 pieces of gear, when combined, that would get me there.
Unless your privy to hard numbers it's just too early to tell how light effects us in the end game.
If you can't complete an event because you can not do enough damage, or can no longer damage anything it doesnt matter if its a 10% to 90% debuff.
They put these hard limits in there just like the hard limits they had in year 1, but there is way more numbers to work with for the end user.
That translates into we are still at the mercy of light levels which is given only through gear.