I think you have to have a lot of confidence that the other team won't house one or more of the kickoffs and that you can cover, which is not something I would say about Tech.Agree it's the default and maybe what's best in most cases. But last night we came out better with the turnover and holding penalty.
A lot can go wrong on a KO return. In general, I hate to see us do one. So why not make the other team return and screw up overall? I would entice a KO return from a team with similar or lesser athletes and wouldn't do against a team with clearly superior athletes. Also wouldn't do when way in front and don't want to give the other team a spark.