I'm happy reading it. I'd studied and played (in a club, real tournaments, etc) pretty "seriously" for about six months a couple of years ago, before stopping completely, even though it was going quite well, when some unavoidable life things got in the way.
Progress had been steady, climbing up to almost 1600 classical (before the statistical ratings hike last year, putting me on 1750). I was maybe going to at least temporarily settle around there, or slightly higher, it looked like. I'd played for a few years when I was younger, but didn't have serious coaching, unfortunately, so this was not 6 months from scratch at all.
What I'd come up with when studying tracks with some of your main points above. I was focusing very much on tactics, because I love them and because it seemed unavoidable - even the high-rated players who don't consider themselves "tactical players" still have an extremely solid tactical reading of any position, and spot all the usual patterns with ease.
I'd even mostly ignored heavy opening work! Which, I must say, is not a popular approach. A friend who'd seen a bit of your game would come up to you after a match in a tournament and say: "I can't beleve you played that on move six against the French defence, that's not the best move!", and I'd struggle to convince them that openings were not my main area of concern aha.
Anyway, thanks again, and congrats on your chess accomplishments - the tournaments truly are wonderful to be involved in, I find.