I agree with nearly all of your post, but not with this part.
The moves game is a clear weakness for Gorst, and I've not seen too much development in this area in the last few years. To be honest, if Fedor moved as well as Justin, he would be in the conversation with JL Chang, Josh Filler and SVB for best 9-ball player in the world, but, despite his world title, he's not in my top 10 yet (JL Chang, Filler, SVB, Shaw, Orcullo, Little Ko, Zheng, Raga, Wu Jiaqing, Biado). I consider Fedor to be the straightest shooter in the world, but it is the moves game that has held him back. The moves game includes a lot more than getting out of snookers, and Fedor's defensive design and safety play are suspect and his use of two way shots and downside management aren't well developed. Yes, Fedor jumps very well, but Bergman is a much stronger kicker than Fedor. I'd also rate Justin as far superior in tactical design elements such as pushouts and choosing between offense and defense. I'd further give Justin the edge in speed control and finesse. Justin's edge in the moves game is gigantic, but I don't think it will be nearly enough, because I don't think that enough racks will come down to the moves game. Justin is, by far, the best tactical pool player in the US today, and his moves game may just be top 10 in the world. His might just be the best tactical game we've seen from an American player since Nick Varner.
I see this match as about 100-82 favor of Gorst. Justin could possibly win it if it the match proves to be a grind, but it's hard to see it going that way. It should be a shootout, and it's awfully tough to outshoot Fedor. I don't see nine on the spot as something that will hold Fedor back that much. You're 100% right in noting that 4" pockets and slow cloth would neutralize some of Fedor's advantage.
PS On a side note, Albin Ouschan and Ko Pin Yi, in my opinion, are better jumpers than Fedor, and Jayson Shaw is Fedor's equal as a jumper.