No question I win more in heavily forested start. I do see Herbalists as problematic though because they also feel like core infrastructure at the moment, it often outperforms the Well in my cities and that seems a bit much.
Herbalist boosting forest looks the core issue, without it when the university and workshops came along to add free yields they'd be good tiles but not enough on their own to sustain city growth- so you'll need to be working a mix of them and also high food tiles (not just every forest in sight & keep growing like now). I think the missing food on forest does need to return sometime in the renaissance via lumbermill upgrade, im only unsure what tech that should be on. Jungle left as is, its not OP- and this would put the herbalist into the dead-end building niche it deserves
Re: balance changes - Would be a real shame to see forest lose science and something making it unique and a reason to preserve, and jungles definitely don't need that hit... I hear people say CV is in the right spot so dunno if zoos matter or not. and the well being nerfed is fine, but i was just thinking how it paled to herbalist already...