*Regarding the transparency - another option is to create some kind of bold frame instead of a solid fill for each hand. This way you can easily see overlaps.
In that case if you could add the ability to have a "v" check near every range category so you could select/deselect it and better visualize parts of each of your range - it will be amazing. For example, my BTN open range have different parts: "Call 3bet", "4bet value", "4bet bluff", "5bet" and "bluff" ranges(which is way I wanted subtree's hehe) which are my near GTO default play.
I think a lot of people who use this software have some kind of default ranges and parts within this ranges. This is why I thought subtree's will be nice, and this feature will be as well.
*#1 feature doesn't have to be transparent as well.
You can just have solid colors: the base("locked" cards) statistics will be full bars(like the blue/green/purple right now - over the statistics %), and the different card statistics will be over it - either half bar, or smaller line in the center of the full bar. And just separate the % with a "," and/or different color.
I hope it makes sense
*Anyway, I think my #2 feature is the most important feature to add.
The software is amazing, and serve its purpose properly.
I just think that thinking about ranges(either yours or your opponents) as one whole range is primitive. Parts of your/your opponent ranges must be analyzed(and visualized) differently.
With Flopzilla already so developed it won't take a lot of changes to make it happen. Then visualizing and analyzing such things will be in a blink of an eye instead of using tons of screenshots(or just working with part of the information every time).