I don't have borderlands 3 so I can't exactly compare. But judging from the temperatures of the CPU, I can see some improvements. What is your ambient (room) temperatures currently?
Also I do have No man's sky vanilla though, I would like to also ask if you can post your temps and fps while playing that game. I run No man's sky at max settings, mostly constant 60 fps other than times like when mining it drops to around mid 40s. CPU temps are rather toasty on my side, constantly hovering at 89 C with occasional 90-91s C hot. Though this is at an ambient temperature of 30-32 C (tropical country, no air conditioning).
Modification I did was i removed the 'paper-like' thingies blocking the bottom vents, not the metal plates though. And I also have a laptop cooler pad.