Well, let's see how it goes.

How much of Hungary did you add?
Croatia, almost all of bosnia, and maybe 33-40% of Hungary itself.
true true, idk if my mac will be able to handle it as well but we will just have to wait and see, like he said he can easily cut out the surprises he mentioned that make the province count go over, or he can just make two version 1 with and without the surprise he mentioned which is what i would do.
I would upload them as sub mods, and I wouldn't be opposed to doing custom requests. For example, cutting out Scandinavia (just Sweden and Norway combined) is around 300 provinces IIRC. So there are definitely options for people. It is really easy to do with the map filing tool.
Just out of curiosity I'm asking this, I don't really mind either way if there is or isn't but do you have events/decisions that set up the burgundian succession war?
Is it the Charles the Bold one?
As far as it runs as fast as HIP with all modules, my computer will be able to run it (I hope).
The "removal or regions" will be available as sub-mods, or does it mean that we will need to mod them out ourselves? I certainly didn't expected the hungarian surprise (one would think that the carpatian region at the period would belong to a setting focused on Eastern rather than Western Europe).
As per above, I would do sub mods for you guys.
I felt compelled to do the area, specifically Croatia and Bosnia, because of their interaction on the coast. And Considering Hungary and Croatia were held in personal union I just figured if I added Hungary the power level would go up enough for them to sustain themselves in game - and I can always remove it if I don't like it, but I think it is worth a go.