I just think, in this day and age, a pull hitter is incredibly easy to pitch around - just look at Gallo. While Jano is great, I think if something good comes along with him involved, you pull the trigger.
Kirk's contact skills are insane (he has been the best hitter in MLB in the last 2 weeks; something obnoxious like 1.500 OPS) and sure his body might give in later on (to his credit, he has been losing weight), but he is talented and improved a lot defensively.
All that said, unless Moreno comes to the majors and actually shows off he is capable of being all that he is in AAA, there is no way you trade either of your MLB catchers - especially because of how this team load manages. Look at Adley, he still has a lot to learn up here.
You bring him up down the road or something when playoffs are locked for some games or early on next year. Otherwise, every 2/3 games, there's gonna be a hole in the C position of hitting + the possibility of Tapia DHing.