I obviously don’t speak for SHN. Link Management you ask for is a major item. A large investment in time and resources to put into a program for which there is no means to recover that expenditure. I put this question to all users who read this, Would you be willing to pay for such a product? SHN put a survey up last year I think and the majority of responders were not willing to pay for enhancements to the Utility. They preferred a free Utility with its limitations rather than pay for an improved version.
If a significant number of users were willing to pay for that function it might get some attention. Also, the source for the Utility is open to the public. Anyone who would like to add that function is free to use the source and build additional function. SHN has accepted improvements from one user which from memory became 1.76.