Of course, this unusual legacy has some interesting side-effects and it can be a little weird to get into the game (e.g. there's two completely different models of doing signaling, and there's a complete rewrite of the passenger-traffic distribution algorithm that makes things a lot more challenging and fun but is buried in some sub-sub-submenu in the settings' Advanced Mode...)
Think of something a little like Roller Coaster Tycoon, but you get to do more network-design work and make tradeoffs between the expense of building a system right the first time or doing something more scalable for the future, and then seeing it blow up in your face when you try to run too much traffic down a congested line :D
I don't like negotiating with towns to let me lay down roads and other infrastructure. After a while dealing with this nonsense by planting thousands of trees gets old and doesn't work all the time. I wish I could just turn that off.
I wish resources didn't run out. By the time I have a pretty cool multi-mode transport network worked out, somebody will run out of resources and I have to undo the whole thing. The maps are big enough that infinite resources would still be fun.
The game gets into these weird modes were my boats or trains or whatever are shuttling around tons of mail, or the lines to use service at one stop are unbelievably long and there's no activity anywhere else. I think it's a bug (but I'm open to it being a problem in my transport network as well).
The GUI gets a little obtuse and fussy for my taste. It's okay when you're building up a mode of transport, but once your network starts to get really medium sized you quickly run into trouble trying to keep track of what's going where or doing what.
Not finished yet though.
It was almost 15 years ago but still not the norm for the time and quite an impressive feat.
What I think is more interesting is the open source clone: http://freerct.blogspot.ca/ and the indie clone: http://forums.tigsource.com/index.php?topic=39904.0
There was also an effort to migrate the ASM to C as a fan project, despite the glaring copyright issue.
Let's just say that it is not for people that want instant results and that tend to work sloppy.
Looking through those alternatives makes me believe that maybe I'll can enjoy one more time that game...
Parkitect is the real evolution of RCT2, like Gangsters 2 the latest version Omerta has great textures and graphics and the original game style, I hope that Parkitect can reach their goal on time as a Kickstarter project