Umm, as far as I know engineer's toolkit can up to triple the ore output.
MFR's liquid routers are pretty awesome in a liquid-heavy build.
Look, there are what, 20 different major techmods, each of which requires an entirely different and complicated knowledge base.
BC, IC2, FZ, RC, rotarycraft, UE, MFR, Project Red, Esmasher, CC, Ancient Warfare, Tinker's, genetics, TC, TE, Ender IO, scrolls, Ars Magica, and even some sub-mods and standalones like Forestry, AE, Witchery, MPA, Blood Magic, Remote IO, and probably dozens more.
And each of these mods requires a different and unique way of setting things up, getting them running, automating them, clearing them out, and often have their own unique 'language' of how things must be arranged in order to get them working efficiently and effectively.
The fact is, a mod that has too steep of a learning curve and does not offer enough 'options', is going to be left by the wayside. Rotarycraft introduced a new power system, and is extremely complicated with massive iterations, and it is struggling despite the fact that it adds dozens, if not hundreds, of new play options.
Factorization adds a paltry few, and requires a complex methodology and a great deal of setup to offer those few options. Frankly it LOOKS cool, but for what it can offer it's just too much 'real' work learning it's particular 'language', and there's too much gruntwork to get to the good stuff.
Ender IO and TE offer a much better setup/learning curve for getting to the 'good stuff', since the machine setup is just flat-out intuitive. Rotarycraft has a heck of a lot harder learning curve, but the 'that looks cool as hell' factor and the sheer amount of stuff you can DO with it, as well as it's complete rejection of the 'magic box' concept, makes it worth the curve. Buildcraft and IC2 are just.... well... old, and pioneered the magic box concept, and some of us are just getting tired of doing the same old thing we have been doing for years. sure, that 'pumping' engine thing was cool 3 years ago, but now? after seeing it in dozens of mods, recolored 'pumping boxes' are just tiresome. But, despite their geriatric status, People learned how to do IC2 and BC stuff years ago, so they are going strong.
Factorization? It needs to either do more, do it better, do it more creatively, or be easier to use. Right now it's an Edsel.