I'm not sure what exactly your asking. I'll take a few shots in the dark.
Regardless of if Malvern is an extension of ECLRT or an independent line, I'd expect
ridership on Malvern LRT be more or the same.
However if Malvern was an extension of the ECLRT I'd expect
ridership on ECLRT to increase massively because less Malvern riders will transfer at Kennedy. Consider this:
-Downtown bound passengers from Malvern would have to transfer twice (at Kennedy and Bloor-Yonge). Assuming a transfer takes 3 minutes each, thats 6 minutes added to travel time because of transfers.
-The ROW part of the ECLRT only adds a 4 minutes to travel times (compared to if it were a subway).
-A downtown bound passenger from Malvern only would need to transfer once. If we assume 3 minutes for this transfer and then factor in the 4 minute longer trip on the ECLRT ROW, that's only 7 minutes added because of those two things. Factor in human laziness (I don't wanna get up and transfer

) and you can see why most Malvern passengers would continue on ECLRT.
Forgot about that. There are also some Centennial college facilities there IIRC.