Hai Joydeep,
You would want to post this question on this space SAP LT Replication Server
So that you get replies directly from SLT team. We have work around to get only Delta you find the below blog which explains that
Only Delta Loading using SLT - Know How
But would suggest you to post the question there so that you can understand which work around is supported or any-other reports are there under development and the road map even more clearly.
Regards,
Krishna Tangudu