Hi Underdog. Nice of him to leave you the procumbens, it has a nice start for your waterfall area.
2nd pic post 47 your last post, I like the right cascade. The left and right one to me resemble the Incredible Hulk
flexing his chest and arms down towards his legs which sort of distracts from the gracefulness of the right cascade.
Honestly from your pictures that post, I can't tell if you've removed one of the cascades or not for certain.
It appears you removed the longest flowing one that split into 3, and either really is fine to remove.
The splits I would work back to just pads myself and keep energy flowing into both apexes.
NO, keep all the upper foliage you have currently, but keep both apexes strong not letting one dominate more than a couple years at most...
...it makes for an interesting tree. A bit of majesty to come so to say several years down the road.
I have a weeping Crabapple tree to plant by the house. Malus 'Louisa' Crabapple it is.
Not sure about the little apples they sink, or at least eventually they do.
Laceleaf maple of the green variety, Viridis, is just as awesome in the Fall as any.
Said to handle full Sun, but don't spend a huge wad on an old specimen that's used to shade
like I did this Spring. Grafted is fine, and being containerized lets you move it about and wire it
unimpeded by the landscape. You could even graft a branch of it sloping downwards
https://www.fast-growing-trees.com/Virdis-Weeping-Japanese-Maple.htm
My local nursery had these 3-4' for $100 but not filled out at all.