Huh. I'm confused as to what there's to be confused about. It's crystal clear on absolutely everything, except one thing.
That one thing is the Ottoman path. It's easy enough to know that you have to take the democratic path and then let the conservatives win if you read the dev diaries, but this requires picking the right option in the events, so it is very possible to screw up if you don't know what you're supposed to do for the desired outcome ahead of time.
The research slot thing is indeed a frustration. Their lack of easy access to a fourth research slot, and the inability to get a fifth is kind of crippling unless you're going to hyper specialize in one particular thing while absolutely ignoring everything else. I'm hoping that this issue will be patched, but in the meantime I'm holding back on playing Turkey further.