It is recommended to decrease your stitch length because it makes tearing out the fabric easier. Before tearing out the fabric, I have spritzed the paper with a little water for the stubborn bits. I like to press a ruler along the longer perforations and pull against the ruler so as not to stretch the seam.
When I pp, I do not align the pieces with a perfect 1/4" - instead, I visually verify that the piece will fit, sew it down, and trim the edge. If the next seam will be close to the first, I trim to less than 1/4"
There is also a method by which you fold the paper back on the perforated line and sew the fabric along the folded edge. Adjustable zipper foot gives the best results. The benefit is that there is no paper to rip. Downside is you have to be careful that the piece doesn't shift.
Nice mini, btw!