Hi out there !
This topic has been a while but I want to share my experience:
I was faced to similar problems, my outer wall didn´`'t connect with the inner wall. I was able to fix this issue a bit more, not perfectly, but acceptable:
Try this:
- increase the infill overlap to at least 30%
- enable ironing to smoothen and connect the outer wall to inner parts:
Since I use this configuration, I had good results by small expenses of increased time and material (around 5-10% ?).
Further settings can be considered:
- printing temperature increase by a few degrees
- decreased print speed
- increase your E-steps for extruding, just a few percent (0,5-1%)
I'm not a professional, but experimenting with above values @213°C print,63°C bed, PLA on glass-bed (no-adhesion additive) had improved my printing quality a lot.