OK, first thing: I am a paid contractor for LWD. So, no, for this work I am not a "volunteer".
Second thing: This is a part-time side job for me. I have a regular day job (I'm a 25+ year SQL Programmer). So I have to fit this work in during evenings and weekends.
Now, for the juice. I have just finished my first read-through. Here are the areas that are going to cost me the most sleep:
1) Almost everything has changed in some way, I'd say 90%. There are very few things that will not change in some fashion. So, a lot of detail work.
2) Core Skills. Not a huge deal, you'll still have to add them, but the initial levels will be free. Adding them automatically becomes problematic when things like Hindrances takes some away. And that everyone will want to customize their own for different Settings. I am thinking a Core Skill tag that will make the initial level free that can be applied to or taken a way from a Skill at any time.
2) Charisma being gone.
3) The Knowledge Skill going away. This one I have a hard time with. There is no catch-all Skill now, and I see that as a major weakness. I'll likely make it easy to house rule and keep.
4) Throwing replaced by Athletics. This is a big one. There are a lot of places the reference the Throwing Skill as it is one of the three combat Skills. Lots of rework over this.
5) Experience Points went away. Now it just counts Advances. Oof.
6) Encumbrance is not a numeric function any more.
7) Vehicle Attributes have changed.
8) And the BIG one. Arcane Backgrounds. Not only can you have more than one, and they have to be treated complete separately, now Arcane Powers have modifiers like Super Powers do. That's two major overhauls. The second is simply tedious. The first, I will have to look at the best way to implement. The hardest part is making it so it can accommodate user-created Arcane Backgrounds for Settings as well as the stock set.
So. I have a lot of work to do, and less time to do it. Good thing the Christmas break is coming up. I know what I am doing between holidays. I'll start on this as soon as I get ths 5.7 update set and out.