A few different rolling stock and locomotive ideas

Now firstly, I love everything in game, but especially the diesel looks weird cause of it proportions, so could you lengthen the locos and make them a bit longer and more proportionate
Secondly. Could you make a bi couplers system, where everything has the same coupler on both ends so you can have double headers and multiple diesel locos on a long train, it would make it 10x better, also, this will help make things quicker so a steam od diesel loco can be put on both ends or can run around the train and couple in the other end and reverse, this would help alot
Thirdly, can you add some more locos like flying scotsman, the up big boy, garrats, maybe even some Aussie locos like the nswgr 73, 44, 47, 38, 49, 59 and 60 or the VR R, K, D3, S And a few other, of course you don't have to add all of these, even if it's just 2 or 3 locos per my 2 lists and just some stuff to make it a bit more diverse, imagine running a VR R class and a few others side by side and racing, that would be so cool

Thanks for reading all of this ranting