Its still very similar to the mod, but there are a few differences imo:
I did not mean the mod for i've never played it,buyed full version the day it was out instead.
I am talking about my first impressions about RO back then,when it was out,game gave a feeling like they were going to fix some issues like:
insta-ejecting from tanks...
ultra-fast weaponswitch,autoswitch
reloading while proning,crawling with IS on,
slowing turn speed on pron maybe limiting the arc like the setup MGs(for example you have some penalty to your sensitivity when your rifle is rested,in other words your mouse moves a lot slower but if you are prone you can turn 180 degrees in 0.0001 seconds,depending on your sensitivity)
some penalties for Run and Gun
big useless tracers(well they are useful for your enemies at least)
very stupid angling benefits in tank combat.
supersonic bulletcrack,well this is not about gameplay but it is an easy to implement realism thing
more blur and suppression effects:
List goes on and as you see they do not seem like hard work at all,maybe a few hours of changing lines,it is not like adding strafing planes instead of Artillery or adding kingtiger or bullet penetration.