While the particular code and implementation of a feature in PHP may change to Python, the logic and process are more important.
Sure there will be a large amount of work involved converting things over but the language is mostly the nuts and bolts of it.
We're more focused on 2.3 at the moment, which has another similar issue. Right now there is a significant amount of work that's happened to convert the GUI to bootstrap which itself is quite a distance away from work in master that has had other, parallel fixes. Merging the two together will be an interesting process.
Right now I wouldn't worry so much about PHP vs Python as much as worrying about the logic and structure/design of the code being sound and easy to follow. Adding even more documentation than usual in the code would also be nice, especially expected inputs/outputs and/or states when defining new functions.