Aside from us Last Gen users not getting the Extra Layovers... I'm a bit worried mainly because the Class 377 horn does not sound right it sounds off compared to the Original one that's on TSW2. The Class 387 horn also sound bad as well it just don't sound good at all and I'm playing on a Ps4 btw 2 of those trains need a slight update.
Here's how it sounds IRL: In my opinion the horn sound of 377 is London Commuter is much more closer to real life than the one of 377 from East Coastway.
This is because the 377 on London Commuter is a "different/updated" version of the one in East Coastway. The problem is when DTG make routes that use the exact same train, the newer route gets the improved version whilst the older route doesn't. This is because there is no base train. If there was a base train, then any improvements to a train (Class 377 for example) those improvements would go to the other routes the train runs on. The only way for East Coastway to get the improved 377 from London-Brighton is if the preservation crew port the LBN 377 to east coastway which doesn't seem to be happening. Issues like this could've been avoided if they had a base or was willing to port the new 377 over. But don't expect the newer 377 on East Coastway anytime soon.
Preservation Crew have already completed upgrading East Coastway route, so I don't think we ever going to have Class 377 sounds to be ported there from London Commuter, unfortunately