I'm not familiar with the original. I loaded it up. To me this isn't really a scenario because it's just connections. You can take one bond and make the connections and just sit and wait for a win at year end. If you play in a different way you are just choosing how long your game should last.
The other thing is that there is no painting on the map. Maybe I'm a little spoiled, but that could improve it a lot. I know there is none on the original either.
As I said, I'm not familiar with the original. It seems a low density map, which is good. But also care needs to be taken with that because industries are more attractive than normal (rail Return on Investment isn't that great). Unless you intend the player to dominate the island for an empire builder sort of style. Maybe a primary net worth target for the player to become "King" of Ireland. Maybe some of the other players (your competition) can be from rich Brewery or Weaving families? So they would own a lot of the Breweries/Textile and associated farms on the map.
I didn't try many starts, but the seeding looks ok as far as I can tell.
The Startup event is not doing anything. It's set to trigger when the human starts a company, maybe it should be set to trigger "At start of scenario."
In regards to a new scenario, the problem is mainly that building is the fun part for most players. Sitting and managing over a long period isn't really the reason they are playing. Especially with a map of this size, I also wouldn't recommend to make a long scenario. Part of me likes novel scenarios that are different from the norm, but really a lot fewer players will enjoy them + they are a lot more risky to get right.
PS. Don't they grow a lot of Potatoes in Ireland? With a couple little hacks you could repurpose Coffee into Potatoes. (It would require placing a file or two into the game folder in order to best enjoy the scenario). And that could also be important for the scenario.
ETA: There is something wrong with the map. Maybe it has been saved with a special character in the name? I cannot put a rough bmp2gmp paintjob on it.
