Well, one thing that is still not universal is Tinker's Construct tool materials. It's clearly shooting up the charts in terms of popularity and compatibility (I've used TiCon since
before it was cool
), but, for example, Redstone Arsenal has no support for it (which makes me sad, as the RA tools
should be the best by their nature, but even the most basic TiCon tools outperform them in every way).
Another thing I have always wanted is better Galacticraft support. I'm not saying that it's a good mod, but Minetweaker has made it possible for me to solve the whole "mine for 5 hours in real time then come back and make your rocket" thing, which was one of my biggest issues.
The need for Power Converters has always driven me nuts, as it doesn't make sense that there's, say, three types of electricity in the world and you need a special machine to convert between them. I realize that a universal system might cause balance issues, but I personally never install RotaryCraft or Industrialcraft expressly because they don't use RF (I don't hate or even disagree with you if you do, and I'll use them gladly, they just won't go into a pack that
I'm making).
As I write this, I realize that my biggest issue has - ironically - been Universal Electricity itself. There's several mods with good concepts that use it, but nobody will make an RF-based version because the mods already exist. In particular, I'm looking at Force Fields, ICBM, Galacticraft (at one point), Whatever mod added the particle accelerator from Voltz... Basically, I personally take issue with Calclavia because he's got a monopoly on sci-fi-warfare mods, and he's decided he needs his own API for it.
Like I said, both here and in the OP, RF is *almost* the universal standard I want, but there's still a couple outliers that refuse to acknowledge it. Again, like I said, content/more APIs in Forge was the quickest though not the politest way to prevent a proliferation of APIs (which drives me nuts).
There. That's another rant done... I'm halfway between "This is therapeutic" and "I should really unwatch this thread because it's unhealthy."