My formal training in writing is a science writer (which I hate with a passion and actually all things science so I don't do that anymore) but even then I was told that I was too brief (and science writers are always being told by their bosses to tighten it). So, my current novel, I wrote the end after 55k. I had several scenes that went like this "A week in prison passed. Bob was miserable, but the constant companionship of his sworn enemy Joe made it livable. Now free, he couldn't imagine ever wanting to attack Joe again." The most important character growth was summed up in a lovely 3 sentences. So, that obviously needed some expansion. After hitting those really obvious, chapter length expansions, I was up to 70k. Now I am going through and fixing and rewriting and if I stopped now (with 9 chapters still not changed), I would be at 83k. Generally, I have been showing a lot more, telling less. On the last chapter, I have no clue how I ended up longer on the rewrites. I cut tons of paragraphs of the main character telling us how she felt. I thought I replaced with just one or two line descriptions that showed better, but somehow it ended up longer. I did some smoothing as well in the transitions and a little more description. I am thinking I will end at about 90k, continuing at this rate. And my beta read has started reading the rewritten chapters and asked "where you going to gave any description of anything or am I supposed to fill it in?" So, I am thinking on the next pass, I will expand a bit more as well, since obviously people need more. So, for me, the weakness is descriptions. I have none. And showing vs telling. Oh, I did add two subplots in my head for this go through, but I have not actually written those in (except for maybe 200 words of foreshadowing). They will take place in those last 9 chapters I haven't got to yet.