After some tests, it appears the current default value of the Freehand Path Tool curve-mode "Exactness", which is 5, is way too much and gives bad results with complex strokes/shapes. This setting value should be "1" by default, as then it makes good lines properly optimized. Please just change this value default to 1.
This bug is in Karbon at first...
Git commit 2218723dc765a5375e6d804683e55fd299af8217 by Boudewijn Rempt. Committed on 01/03/2013 at 14:47. Pushed by rempt into branch 'master'. Set the freehand tool curve exactness default value to 1 CCMAIL:somsubhra.bairi@gmail.com REVIEW:28284 M +1 -0 krita/plugins/tools/defaulttools/kis_tool_pencil.cc M +8 -0 libs/basicflakes/tools/KoPencilTool.cpp M +3 -0 libs/basicflakes/tools/KoPencilTool.h http://commits.kde.org/calligra/2218723dc765a5375e6d804683e55fd299af8217