Some WTP fares get a Club Europe connection [or they used to] - wouldn't be the same for reward fares. If there's availability you could choose to book in CE, though that might require a call [try using the stopover option as that might work, I'm not overly familiar]. Pretty sure the default if just searching EDI-DEL would be a Y connection, and you'd obviously have to pay more if you chose to go up to J.