[3] It would complement the existing 509 Harbourfront service that connects Union Station to Queens Quay west of Bay Street.

[5]: 10  If the design is approved, the line could partially open along Queens Quay East between 2030 and 2033 but with Union Station bypassed.

[5]: 11–16  On the south side of Queens Quay station, there would be a double-track wye junction to replace the existing curve.

[5]: 73 In 2015, the estimated cost to build the East Bayfront LRT from Union Station to Small Street was $520 million.

[6] By October 2023, the cost had risen to $2.57 billion broken down as: $932 million for Union Station Loop, $1.3 billion to connect Union Station to Ookwemin Minising, and $337 million to connect lower Cherry Street to Distillery Loop in a separate phase.

[13]: 16, 17 The underground streetcar loop at Union Station does not have the capacity to accommodate the extra light rail vehicles needed to service the new line.

[14] A sewer at Queens Quay and Bay Street will make it difficult to build an eastern portal to bring the tracks to the surface.

The plans called for two access streets, which would cross the proposed light rail line at signalized intersections.

A WTR report dated November 13, 2017, stated that: In January 2019, the Waterfront BIA (a neighbourhood business group) estimates a $1.2 billion loss of productivity and a $20 billion loss of federal, provincial and local tax revenue if the opening of the East Bayfront LRT were delayed from 2025 to 2045.

Sam Crignano, president of Cityzen, a developer with three projects along the eastern waterfront, said that having two or three bus lines in the area won't be enough to handle the future influx of new residents and employees.

[24] A report about the Waterfront Transit Reset project dated November 13, 2017, stated that: "The City, Waterfront Toronto, and the TTC would carry out the approved plans for a new streetcar line along Queens Quay East [to Parliament Street] in the East Bayfront area.

"[16] Since the provincial election of June 2018, when there was a change in government, the province has made no promise to fund the Easy Bayfront LRT.

In January 2019, the provincial Ministry of Transportation said it had not received a formal request for funding from the City; thus, the province remains uncommitted.

[17] In June 2019, Sidewalk Labs offered $100 million in "credit support" to build a portion of the East Bayfront LRT between Cherry Street and Broadview Avenue, which would pass through its proposed development in Toronto's Portland area.

[12] On June 17, 2020, the TTC Board approved spending $15,000,000 over three years on design work for the expansion of streetcar platforms at Union and Queens Quay stations as well for a new tunnel and portal for the East Bayfront line.

[3] An October 2023 city report recommended that a streetcar connection along Cherry Street between Lakeshore Boulevard East and Distillery Loop be delivered as a separate contract in a later phase because constructing such a link may conflict with Ontario Line construction and the planned Gardiner Expressway realignment.

[26]: 4, 14 In May 2024, the TTC introduced the 114 Queens Quay East bus which would roughly follow the route of the proposed LRT.

By January 2025, the TTC proposed setting up interim bus priority lanes along Queens Quay East between Bay and Parliament streets as a forerunner to the LRT.