The National Capital Commission dramatically altered its vision for Lebreton Flats.

"Incorporating Official Plan Amendments" January 1997.

Highlights.
 "There is an overall height limit to uses for LeBreton Flats which limits building heights to 10.7 metres" or 3.2 storeys. Page 41/164.
( At this time, June 29, 2020, the proposed height of the many condominiums will be 25 to 55 storeys.)

"Views of the Parliament Buildings and other national symbols will not be obstructed." Page 40/164.

 The Parliamentary Precinct will be extended westward. Page 49/164.( What that means - Les plaines LeBreton was supposed to be a part of the Parliamentary Precinct, which includes the federal government buildings on Wellington Street and the northern half of the Sparks Street Mall. The primary purpose of LeBreton was anticipated as a public gathering place for festivals and celebrations; a location for national museums and commemorative statues; a venue for tourism activities and park land for children's playgrounds.)

Almost forty percent of the site is devoted to open space in the 1997 proposal.
6.2.1.
The dominant land use is open space. In total, the amount of land dedicated to open space is 26 hectares, about 39% of the overall site. Page 48/164.
7.6. Residential.
In total,the area designated as "residential" is 6.5 hectares. Page 61/164.

The 1997 LeBreton project was respectful to the needs of surrounding neighbourhoods---to the potential impact on traffic, air quality, noise level, etc.:
"The relationship of the proposed LeBreton Flats neighbourhood to the adjacent community was a consideration in the design and layout of the land uses, street pattern, pedestrian and cycling pathways, etc. The connectivity of the LeBreton flats to...the Parliamentary Precinct, Central Business District, the Island land and the Dalhousie and Mechanicsville communities was important. The  new community will not infringe on the liveability and identity of neighbouring communities." Page 101/164.
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Mayor of Ottawa January 1997 - Jacquelin Holzman.
Mayor of Ottawa June 2020 - Jim Watson.
Head of the National Capital Commission January 1997 - Marcel Beaudry.
Head of the National Capital Commission June 2020 - Tobi Nussbaum.