It's not entirely clear to me from the OP - are you saying she was playing on a 14U TB team and now is moving up to 16U? Or has she not played TB yet, and is thinking about playing 16U TB for the first time?
If it's the latter situation, at 14U/16U, if your DD is not playing TB yet, she is "late" getting in but it is not impossible to make the transition. The real question is why does she want to play TB rather than rec ball? Did your DD develop a real passion for the game recently and now wants a more competitive experience? Does she want to improve so that she can play HS ball or even college ball? If the answer is "No" to both those questions, or even "Not Sure", then she is probably better off playing rec ball or looking for a less competitive team where she can have fun while she improves her skills. If she has higher aspirations, she needs to find a team that will provide her with the coaching and training that will move her to that higher level of play, and she needs to put the work in on her own (or with private coaches) that will help her earn playing time on those more competitive teams. And as others have mentioned, the commitment needs to go both ways (from your DD to the team and from the coaches to your DD). It sounds like the current situation is not the right one for her.
Have your DD ask herself, why play TB, pros and cons?
If it's the latter situation, at 14U/16U, if your DD is not playing TB yet, she is "late" getting in but it is not impossible to make the transition. The real question is why does she want to play TB rather than rec ball? Did your DD develop a real passion for the game recently and now wants a more competitive experience? Does she want to improve so that she can play HS ball or even college ball? If the answer is "No" to both those questions, or even "Not Sure", then she is probably better off playing rec ball or looking for a less competitive team where she can have fun while she improves her skills. If she has higher aspirations, she needs to find a team that will provide her with the coaching and training that will move her to that higher level of play, and she needs to put the work in on her own (or with private coaches) that will help her earn playing time on those more competitive teams. And as others have mentioned, the commitment needs to go both ways (from your DD to the team and from the coaches to your DD). It sounds like the current situation is not the right one for her.
Have your DD ask herself, why play TB, pros and cons?