BE/MD-LTT Daily train via Aligarh Agra Jhansi proposed thi. Lekin abhi tak koi kaam nahi hua uspe.
No idea about Hathras Jn Flyover, lekin agar bana toh baht achha rahega. Mathura will get connectivity to Aligarh, Kanpur and Kasganj can get connectivity to Delhi.
But sabse zada zarurat Achhnera Bypass aur Mathura Junction multiple lines ki hai. Which will avoid trains to run via Achhnera and reach Agra Fort