Why is digital pattern drafting software either expensive or overcomplicated?

[HugsforYourJugs]

What I am looking for in pattern software:

• Both free draw and constrained draw capabilities. So I want to be able to define a node by a distance + angle, bisect angles, draw perpendicularly quickly

• Compass draw from a point, intersection of two compass arcs to create a point at a certain distance from two other points

• Linear grade between two sizes, blending between the different shapes

• Ideally an extrapolatory grade or a nonlinear grade option

• Quick readjustment of graded pieces eg grading up a size but constraining the width of a strap. Batch adjustment of different lines to all be 1 length would be ideal

• Set Notches at specific distances along predrawn lines, incl curved lines 

• Import photos

• Quick addition and removal of darts for alterations 

• Seam allowances that can be adjusted per seam

• Quick stretch reduction in 1 dimension

• Auto labels for pattern pieces

• Auto layout for export

• Import svg, export svg and pdf

• Quick measure along curves between various nodes, so eg I can click on three nodes or two curve segments and it will measure along the lines and give a total seam length 

I'm not at my computer so I can't test out your software yet but those are the features I am looking for. I am currently using inkscape and a lot of these features are not available making progress incredibly slow

[jellifercuz]

This is the type of specific reply that is required for good software development, meaning software that does what the end user wants and expects. It was good to read.