I can see that. But I suspect it’ll be harder to pull them off. The new maps look soooo much tighter, with more opportunities for flankers and less distance for Mercy to run. Time will tell though.
And I agree, I think 5v5 will be tougher, and the lack of DPS potential from her might be a problem. I could see them going the other direction as the OP, where they actually increase her DB, just to bring up its dps amount to be equal with the other support’s DPS. She’s at what now? 1-2k dps or something. Again, time will tell.