[Taera]

Of course all of you are right.
The point is to make an all-accepted mod that will balance the things a very little.

As for PPB, small damage reducement or ROF of 2 will just make it fine.

As for Crystalline weapons, the only actually powerful weapon in their tech tree is the High Energy Amplifier (or whatever is it called). Now it is located on levels 7-10 of a tech tree that begins with 20k cost for the first level.
Their Energy Dampener(sp) is also just weaker than the very similar Mental Flailer from the Psychic tech, and is much weaker by its damage while the cost the size and so on is same, only it is located higher on the tech tree (6-8 i think).

Now i am not sure about the Shard Cannon. Though neat at level 10, it is a pain to research. Still the armor passing ability is nice thing to have.
I wont say anything about it. In fact, i guess this can be left alone.

So overall changes will be minor as it seems to me.
The whole project begins to look useless. Better just try to somehow convince the MM to change the PPB in the game itself.