John Liberal's Smart Track scheme also proposed tunneling through central Etobicoke. Network 2011 proposed the like, in fact it was to be a full fledged subway, not light rail.I think it's just the usual subway politics. Ford lives in the area and doesn't want above-ground transit. And neither do his conservative party constituents.
One simply cannot point fingers at Ford in isolation as to why grade separation is being suggested here. As one noted a few posts back Eglinton is like a highway through the Richview corridor. Why endanger pedestrians to have to cross into the median to access the Crosstown trains? Even City Council wants it separated now. No need to complain. Money for other projects elsewhere will materialize, so the need to cut corners on this is unnecessary.