I was able to get a solo game of Root in yesterday and it was really fun. I say it's kind of first impressions because I tried an old version once last summer. I'm going to be using Brian's (@Skurvy5) Battery (yes I named it haha), system within my review.
I played as the Woodland Alliance against the Mechanical Marquise and Electric Eyrie. As you can see in the photo I lost. But it was a close game.
Overall, it was a fun experience. I'm sure I messed some things up but I think I got it mostly right. I did mess one thing up at the beginning and had to back track a bit but that's okay.
(+) It's not terribly hard to learn and follow the instructions on the player boards. (I will post a couple of videos that helped me below)
(+) I got to play Root even though I had no one to play it with
(+) I'm so impressed at the creation of these bots. They work really well and I think it'll take me about 45 minutes in the future when I don't have to read the bots rules as often to get it right.
(+) It's a pretty good challenge at least against two bots
(+) I think it'd work well to add one to a 2P game and I think the bots would work well just running 1. This is different from playing with others as I don't think a 2P game is very good.
(+) I think it's a good way to learn how to play the factions that can be played with the solo mode
(+) I think the PNP is enough. No reason to spend money on the Clockwork Expansion. I think it has a few less things but overall it does the trick. Since you're not really playing much with the Bots boards it's fine just on cardstock.
(-) It's a different game. Yes the rules are similar and mechanics are the same but Root relies a lot of table talk and obviously that's lacking.
(-) You can't really ever play as the Otters, Lizards, or Corvids. This means less options for playing.
(-) I wouldn't suggest Root as a primarily solo game only if you want it to be the game it was intended to be. It maybe could work for some.
(-) You can't convince the bots to attack each other.
(-) I think at the moment you can only really play on the Autumn Board
Overall, really fun and I'll definitely play it again solo just to get it in when I can't with a group. I think I may try to play as the Moles next, maybe just against one Bots.
(I'm going to post a few more pictures in the comments.