I've been meaning to comment for a while now: whenever I see a mod introduce a lot of new content (i.e. Dig Deeper and Genesis), I find I want to see a 'tech tree' of sorts introducing the new alloys and extracts. At present the Genesis thread OP has a flow chart of sorts for the alloys but nothing on the plant side. All the information is there for us to dig up, especially if we read the raws, but it'd help newcomers to the mod if you organise it in an easy-to-absorb way.
Afterall, when we learnt DF vanilla we all had to learn which plants can be milled, threshed, cooked or brewed and what seasons they grow in. There aren't many plants in vanilla and normally people ignore the surface plants while they learn the underground plants as those are the constants that every fort can expect to work with. It's a long process to learn everything relevant about farming and without control over the food industry nothing else can happen in a fort.
Similarly, we learn various facts about the metals before we're competently fielding armies. In what order are the metals best for sharp or blunted weapons? Which are best for armours? What are the requirements to make the combat alloys (bronze and steel for vanilla)? Which geological category of rocks should we be aiming for to find them? What about melting points, in case magma gets involved?
It's a lot of information and for vanilla there isn't much metals or plants that we need to memorise all this for. One of the hesitations holding me back from playing a big 'new contents' mod is that I have to go through this noob process of soaking up information and I'm not receiving much if any help in this process (unlike vanilla DF which has a wiki plus an extremely helpful and erudite forum community). I don't need help learning everything about the new content, but the food industry (so domesticated animals information too) and war gear industry are the most relevant sectors for fortress survival. I'd like to see the additions in these areas be presented in a succinct way (so a table or a tech tree flowchart perhaps).