I'm used to playing on Custom. XD
though I pretty much crank everything up to maximum settings for a high-speed mindless click-spamming (

wat) killing spree game except for maybe damage (don't die too fast) and one of the research options for which I didn't fully understand the function so I left that at default...
On the Hiigaran MS... there was once the AI took it out when I forgot to install the Battle Asset on it, and "my heart went emo" enough that I quit the game even though I still had two SY's. But I would've lost even if I kept a cool head since the base was now defenseless without the MS and the next Vagyr spamming wave was only 10-20 kilometres out and closing...
I thought the TFS terminology thing was cool + somewhat liked the gameplay in that mod, but I had to "script kiddie" one of the game modes because it didn't have the n00b-friendly RU injection I was after.
But YES it's just as confusing to me in the sense that some things are not as obvious as Complex (eg Complex may have 10x more stuff and you'd probably never finish the whole tech tree over the course of a short game, but as game time goes on it all tends to settle down; whereas with TFS it's either I find a textbook and read it for a good hour or something, else remain empty-brained.