Search wise you can use GTSpotter to search help topic, I even added that myself as a plugin to GTSpotter at some point with even the ability to preview help inside GTSpotter.
Look wise, sure pharo help isnt the prettiest thing but I would not it say it sucks, it does its job okish, it displays help text.
If you want docs that are looking very good, Pillar is doing already that and it outputs in the most portable formats, html and pdf , that makes it easy to take documentation where you cannot use pharo, on tablets and smartphones.
As a pharo developer I am very much against of cramming things that already exist outside pharo image and do an incredible good job that would take years if not decades for pharo to catch up , instead of putting things inside to make things harder with close to zero benefit.