The SSE budget and the Eglinton East budget were almost never linked. With the exception of a few months when John Tory's team was counting the cost of the 3-stop SSE, then decided to build 1-stop SSE plus EE LRT, then realized they don't have the funds for that combo and shrunk their plan to just the 1-stop SSE.
Fundamentally, EE LRT was booted in 2009, when the Liberals still had a firm hold of Queens Park, and Rob Ford wasn't yet elected. The provincial government decided it cannot pay for the escalating costs of the 8-line Transit City LRT plan, and shrunk it to just 4 lines (Eglinton, SLRT, Finch West, Sheppard East).
See here:
https://transittoronto.ca/streetcar/4121.shtml , search for "2009"
Or here:
https://globalnews.ca/news/207955/timeline-a-history-of-transit-city/
Since then, EE LRT is in hibernation, except for a short-lived resurrection during John Tory's SSE struggles.
If we want to fund EE LRT right now, the funds must come from switching the low-ridership EW LRT to the surface. Not from messing with SSE again.