Well of course Metrolinx would/should be paying up for the extra costs associated with the enhanced shelters. The costs which in all honesty, aren't as significant as what some people think it could be.Who will pay for the redesign, extras and materials? Developers value engineer everyday and what was not promised on feature lists or contracts, are not obligated to be added in. Sure its sensible, but you would be naive to say that its as easy to sign off. Shelters are not off the shelf for this project. Design, permitting and tendering takes time. With the thousands of backlogs at the city right now, just getting a shelter approved for permit can take months, especially given the current climate. You can tender at the same time but it will cost just as much time to sign the contract.
So yea it'll take an architect and engineer about a months total worktime to design from scratch (AFTER all the various concepts have been weeded out), but everything else behind the scenes in a bureaucratic institution takes much more.
Metrolinx literally picked the dollar store version of shelter design. To go from a dollar store shelter, to let's say a Walmart version isn't all that significant.