Why not to give the one common simple way to select sort and group order for every list?
Just put Group by: Sort by: Then sort by: at the top of any list. There might be "Manual" item in Sort by: lists. And it is not needed to select ASC/DESC as separate option, just dublicate sort types with ^ or v symbol.

The most needed sort order for me is by task title. And there is no way to sort by title now at all, even in advanced search.

If you think it will make Doit more complex, just put the option into account preferences like "Give me to dicide how to group and sort my tasks by miself". Everybody will be happy.