Having an extended babyface Shield run will also get Roman some significant goodwill. The Shield is arguably the best stable in WWE history (I do not even think it is that arguable to be honest) and looking back Roman was the best worker of the three. Him being portrayed as a cool badass leader of a highly popular stable is nothing but a good idea.
I can see an argument for 97 Hart Foundation for the promos alone. Plus they had way better rivals.
Not to mention the booking of the whole feud was actually compelling and interesting.
The Shield, ironically enough, is completely a "workraty"-style unit. People remember matches with snowflakes and that's it. And it's kinda funny after now years of hearing how much Ambrose and Rollins actively suck, how magically the Shield is awesome again and the greatest thing ever. It also shows how desperate they are with Reigns at this point.