If you are on a SP game, the complexity has NO BEARING at all, and you can have a BP that is as complex as you want (within the CPU limitations). This is only a guide for servers, to help with limiting lag. If you are playing EGS on a server, and are being limited on your BP complexity, then you would need to bring this up with your server admins, This has nothing at all to do with the RE2 devs.

RE2 CPU is actually a bit more fluid than the vanilla tier system, Using the tier system, you have to have all Extenders in that tier for them to apply before you gain the benefits from the increase in CPU points. As soon as you lose 1 of the extenders in the tier, you lose ALL cpu point in that tier and can go seriously over CPU losing efficiency. RE2 (and likewise RE before) you can add CPU extenders as you please as it is an additive system, each extender adds to you CPU points total until you hit the max allowed (which is around the 2.1 million mark at the moment). If you happen to lose one, all you do is lose the point for that one extender, and not for the whole tier as you would for the vanilla tier based system.

Based on comments on discord, I believe that there are some changes happening at some stage to the amount of CPU points available. However, the exact details of which is really for Ravien or Vermillion to explain and detail.

And number 3 isn't possible.

I personally would like to see tons of different handheld weapons. Even is differences between them were minor that would significantly improve our gaming experience. Long story short - I want more and more :).

There are lots of handheld weapons; but there's no point in adding new weapons if they're worse than the ones already there or so niche that no one uses them.
There's more than a few secret handheld weapons and weapon mods that most people haven't found yet.