So...why are there so many things that go against what the mod authors want? Liquid Mana, combining essentia, higher rate of Mana to RF...why not just break everything while we're at it?
........I do like the pen.
And Mojang didn't want multi-use potions, wands that shoot lightning bolts, and sacrificing creatures to absorb their life force.... Why would the mod authors add them?
In all honesty, most of these things are stuff the mod authors have said they won't add to their mods, not that they shouldn't exist. In most of these cases the statement made by the mod authors is that the feature would be OP. Well, this mod IS OP, and it's intended to be. About the only thing I can think of a mod author said they absolutely didn't want was converting essentia to fluid which this mod doesn't do.
This a mod about using a combination of magic and tech to do things neither can do by itself. Of course it is going to break some of the rules. That is its purpose, to transcend the boundries of using magic or tech alone.
But, every feature can be disabled via the config, so if you have a problem with something, turn it off.