The Maudlin challenge (see this blog post for details) was a worthy criticism that spurred further development of TI. However, it is not at all the fatal objection that it was taken to be for over a decade.
The final version of the refutation of the Maudlin challenge including Marchildon’s approach, published in SHPMP, can be seen here:
http://arxiv.org/abs/1403.2791
Also, there is increasing recognition by quantum foundations researchers that spacetime may not be the whole story, and that spacetime events may arise from sub-empirical quantum processes. This concept will be explored for the layperson and interested researcher in my upcoming book, Understanding Our Unseen Reality: Resolving Quantum Riddles (published by Imperial College Press). Stay tuned!
Transactional Interpretation 
It is worth backing up and asking why this question even applies Buzard
Thanks Efren, can you clarify what you have in mind here? Are you saying that you are not sure that the question applies?