I think moderation is the key with all the things you questioned. Yes, agave, if consumed in excess, would probably feed yeast. Just like it's not a good idea to eat fruit in excess because it feeds the yeast. Having no sugar of any kind would be the ideal, but the reality of that happening is zero...So if you must sweeten something, i'd say agave is way better than using white sugar or artificial sweeteners.
Molasses I'm not educated on. My naturopath doesn't want me to have it, but that could be a personal body thing, and other people would have no problem consuming it.
I've used coconut flour before. Seemed OK. I didn't notice a surge of yeast in my own body, but everybody is different. Again, in moderation, probably would not harm you.
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