I always thought it would be badass if the bubble offered Invisibility. As in, when you are in the bubble you are completely and utterly invisible to enemies. Why this is good? People would have to guess whether or not to use their super on your bubble as in it could just be a decoy. Once an enemy enters the bubble the invisibility would be lost but this would still give the titan the first shot in the bubble (Unless rocking Helm St-14).