For me the worst on the Pulse is the battery. Had to change one after one year and the new one is losing charge at a seemingly higher pace than other machines. :(
I have a 2y old PF5NU1G (a second run Mechrevo CODE 01) as well, and the battery has decayed to ~73Wh (from a 91Wh original design). The one bright side is that the replacement battery, PFIDG-03-13-3S2P-0, seems to be pretty cheap ($60, shipped by boat from China) if you know you're going to stick to the same laptop for a while... https://www.aliexpress.com/i/3256803017144797.html
I still have minor nitpicks with it, but those pale in comparison with the display port upgrade they did.