Glad to hear you are making progress! I actually have the same issue as you do with our hybrid framework, ExtJS. Some of these frameworks play around with the default click action to make it act more like a native app and it interferes with the way automation performs a click. I solved it in the same way you are describing in that write up which was to switch to the native context and “tap” at the coordinates needed. It took me quite a while to figure that out myself so good work there. I have not found a better solution than that…
When you say it is slow, do you mean it is slow at runtime or slow to implement? I found that it is somewhat slow to run but not unacceptable. I wrapped my native tap in a global method that takes an element to tap and it handles any phone size so its not a big deal to use it over and over again