From the link thoughtfully provided by AoD:
There are multiple interesting concepts, I only have space in the post for a few. First up, a change to the Waterfront Promenade design vs how the existing one looks:
Note the open plants between the trees in this design, I approve!
However, they are still wanting to go with 100% Freeman Maples; very risky strategy. I get the appeal of an Allee, I have no problem with picking a species and going with only that for 1 block, but then swap it in the next block.
You can do so many interesting things with that in terms of different forms/colours through the seasons. All one species and if something goes wrong (disease, water levels, pests) they may all die.
Understorey plantings:
Ok....then. LOL
Send back for refinement. Dont' get me wrong, I love many of the plants on this list, but this is an odd and ambitious list. Soloman's Seal is probably the safest choice.
Carrion flowers, however, smell like rotting flesh; that should prove popular, LOL
Spicebush, Mayflower and Foam Flower all like boggy/moist conditions.......not clear to me how they intend to sustain that.
They propose passive irrigation which should be fine once the plants are established......
Trees all one genus? (Elm).....I wouldn't.
Elms are fine.....but don't go all one genus.
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Lots more if you follow the link.