Currently downloading a nice fresh copy of just the base game (all my DLC deselected), so haven't played just yet (wiped my old large install, which I do each year to limit old installs corrupting new ones - it shouldn't - but...
)
Anyhow, i'll edit this post later with my thoughts. but the "Academy" is actually listed as a separate DLC within the DLC tab of the game. So if you don't want the Academy simply bring up the properties for TS2015 go to the DLC tab and untick it. Game should then take a minute or two to uninstall, job done!
Edit (after a quick play):
The Good! -
You can now disable the intro video via the in game 'gameplay' setting.
FXAA
appears to have been tweaked slightly, I guess they finally realized that it was blurry..
The Bad -
Sliders now represent Shadow quality, water quality, etc.. with no reference to either a number i.e 1 being lowest or 10 highest / low, medium, high, very high. Not good if you're tweaking for best performance / quality
Menu music is only slightly happier, than previous (yes, you can turn it off in the menu too)
Undecided -
UI, well it seems that what used to be the 'Career' button has transformed into a profile button which also now has the workshop, items you own integrated into it, etc.. So in one way it's less confusing to a "newbie" in the sense that you would hit that 'Career' button thinking that the scenarios would be there when they were actually under 'Drive' / 'Career'. A small improvement there..
But lets face it. the best and most simple interface was the original RailSimulator / Railworks (&2) title screen. I guess though everything has to look flashy rather than be functional
I really need to set some time aside to really evaluate it and at the moment I've got other games on the go on other distribution platforms so my Steam catalogue is semi-dusty