I've had a few issues I've seem myself.
I don't have any temp differences between layers. I often set and go. 190-200c for PLA with bed at 45-50c
I did find the First layer of your PART is printed at 100% of max speed. You would think the first layer speeds would apply but it's only for whatever your first raft layer would be. If you print with a fast speed, you are going to have to slow down to get it to stick with a higher separation distance.
I personally have the base layers turned off on raft. Shouldn't make much difference depending on bed temp and air flow.
I have my layer separation at 0.3mm and it sticks just enough and pulls off clean but I've had drop max speed down to 60mm/sec which is probably higher than some. Without rafts I been able to get good prints getting as high as 80mm/sec in some sections of prints