Hi Vinod,
I don't plan to add more changes to ticket-tracker lite. We will just do bug fixes in case some thing crops up.
For the next longer release (4.7) we need to discuss if to keep ticket-tracker lite or just have ticket tracker alone. In case we decide ticket-tracker lite we have to slim it down to reuse the core codes and standards. That will be one bloody upgrade script. I am glad ticket-tracker lite is 4.6 ready.