Pros:
There's something about a big ol' heaping of variety that always improves my take on a course. Not just a variety of shots, and distances, although those are obviously good too. But variety of scenery. Variety of setting. A course that mixes it up and still feels like one course (NOT having two nines that feel like they don't belong together) is always going to score highly with me. And that is what we have in Jonesville. From the parking lot to the edge of the woods on the first hole.(one of my favorite ways to lead a course, it just has that hole one feel) A few holes carved out of dense forest, then out to an open field. Back across the woods at the mid-way point before a final stretch of field holes. It's an incredible flow built on a great variety.
There's also something about a course that plays to a certain skill level, and those are rarer than you think. So it makes me smile when I play a course like Jonesville and think, "wow, this is textbook intermediate." The woods holes feature clear, defined fairways that are generous enough without being non-technical. Some good lines, here. Not Charlotte-tough, but good lines that should test an intermediate-level player appropriately. The open holes aren't that open. Most are the opposite of the woods holes, where an open space has been built into a fairway by planting trees. (And this course should be fun to watch develop as those trees will grow.) There is challenge there too, and not just from the distance.
For players of that skill level, this is an ideal, play-all-the-time-course. It's just going to hit that sweet spot of fun and challenge. I do think that the variety will keep it interesting for players that don't happen to fall into that ability category. It also help that everything at Jonesville is really well-done. Everything looks good. These fairways are beautiful. The trees are well-placed. Even the paths between holes on the wooded sections are among the best I've seen. It's a well-designed and -constructed course that I highly recommend for all players.
Cons:
While I do think that all players will enjoy the course to a degree, it's definitely true that players outside the target skill-level will find less to like. Top players will probably find the least to like, for two reasons. First, they likely have seen tons of courses, and nothing at Jonesville will be novel for them. Second, Their skills will let them exploit the course. Yes there are obstacles on the open sections, but nothing an open player won't be able to go over the top of. Yes, the lines on the wooded holes are technical but an expert will not find them challenging at the distances available. At the same time, a new player may find those woods lines too tough and the rough is fairly rough. They may also be exhausted by the distance on the open holes.
Other Thoughts:
It says that the course is still in development, and I believe it must be close to finished at this point. I will say that it looks a lot more finished than it does in the pictures taken six months ago. (Nothing felt as open as some of them look.) There are probably some finishing touches (a few more next tee signs hopefully) to add but it is very much ready to play. I didn't want to add this to a con, (and it would be if the course was advertised as completed) but there are a few transitions that need directional aids. I wasn't bothered by it, because for once the course map was completely accurate and easy to follow, but it is something that needs to happen. (and probably will, the way that everything else has been thought of here.)