More extensive stations for high-floor LRTs? I beg to differ, the U.S (the country which loves to do everything big and grand) has numerous examples of lines that implement stations without obscene step ups and ramps from street level.
Here's one example with the Metro E Line in Los Angeles:
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The reality of the situation is, high-floor LRVs would've been far more appropriate of a use for the Finch West and Eglinton lines. Unfortunately that was never going to be a thing because both lines were designed under the Transit City vision.
The Hurontario Line on the other hand is one where high-floor LRVs are clearly the much better and appropriate option (since LRT technology was chosen). Unfortunately Metrolinx is an incompetent, idiotic and useless organization so of course that option was never considered.