Your solder could make do with a reflow. Some of the pads look like they have no solder at all. I’m sure they do, though. The solder should flow through the hole. Also, check all the values to insure nothing is off there.
The schematic says 2M also. It’s just a buffer though. Use what you have. It looks like they’re being used as a voltage divider, so you should be fine. The output, according to my calculations, should be the same.