No they should go back to their original purpose of being able to replace the champ if they refuse to fight. It's to not let the champ stop the line whether it be doing what Tito did or getting injured for years. An interim belt allows to recognize existence of said champs while not letting them shut things down. The issue is that very legitimate use has had the shit abused out of it. Today not only are the guys refusing to fight the contenders Dana asked, but not getting ready in set timetable.
This has nothing to do with the sport there was no reason to strip either Tony or Colby who were agreeing to fight the champs just not the timetable due to injuries. When you do that it's really because you just don't want to scrap a title fight a watered down card might is being carried by and might have to be cancelled without. Giving out a second belt then taking it away for(insert bs here)doesn't undo the title and Dana should know very well that sort of thing is why boxing ended up with alphabet soup.
But the idea of an interim belt makes sense. The interim title exists for pretty much every important job as a transition for when people leave. or are stepping away and it's unclear if they will return And it's the actual title and often becomes the real one, that's what it's there for. That's what interim should be used for. Instead of when the champ leave the tile it's become "to legitimize the arbitrary removal of a champ whose real life problems inconvenience me". Dana was right to have Chuck and Randy fight for the interim belt when Tito basically refused to fight anyone who he thought could beat him. It's there for a reason his stupid use of it to prevent titles being delayed a few months doesn't change that.