The problem with script mods isn't that it is hard for the script modders to update the mods for python 3.7, in that regard it is just like any other update to the mod.
The problems dealing with the patch is three fold:
1) There are the usual script changes created by any major patch.
2) All script mods need to be updated, therefore unsupported script mods will simply be lost (until someone remakes them).
3) We need to develop a decompiler for the new python version in order to look at the game code.
The last problem is the one with the most impact for the future and for the big mods (such as mccc).
I have been working hard on a completely new decompiler, and making good progress.
But I am not the only one working on making a decompiler work with the new python version.
Most script mods will, however, not need to have the decompiler to be updated. But without it it will be hard to make mods for the new features.