Yeah, i heard about the nerfing of vanilla saplings. It makes sense. Currently, only reason you'd even go Treebreeding would be to get seed oil from walnuts/chestnuts, and if you wanted to prettify your base, with different trees, and different planks. This way, Sengir will at least get people going into Tree Breeding. Which requires bees. Which is another incentive for you to do bees. Which is a huge part of the mod. Makes sense, right? Making you use all parts of the mod to be able to get the most out of it.
One thing that should be done, however, is make peat more useful, either giving us an easier way of getting bituminous peat, or a more early game way of automating peat production than multifarms. Biomass currently is the go to method of early-mid game energy generation if you go Forestry, before you can go Biofuel/Boilers or Combustion Engines. Peat is used more as a way of generating low but constant power to run arboretums, but with Multifarms taking increased amounts of MJ to function, where does that leave the peat fired engines? They only output 1 MJ/t. Peat lasts a while, bituminous peat lasts even longer and it gives 2 MJ/t, but the way you produce Bituminous Peat is, first, getting a large surplus of ash, which requires you to run peat fired engines for quite a while, and secondly, by getting a good amount of propolis, which takes even longer.
In fact i have never, ever, ever seen anyone use Bituminous Peat. Not even once. With Multifarms taking so many resources to make, and high amounts of power to run, peat fired engines fall into a limbo where they're not so useful. You can, of course, produce peat manually, but it's a painful and long journey into disappointment. Why would you want to make peat fired engines if to produce good amounts of peat you already have to have an established MJ network? Doesn't make sense. Now with biomass production nerfed, even more effort will be needed to produce renewable energy using forestry. Getting into tree breeding, which requires bees, which requires a lot of infrastructure to really get going, because you'll need alvearies, which mean multiple squeezers making seed oil, requiring big farms, etc...