SEHS is a phenomenal route, but it is lacking one thing - the Eurostar. I'd love to see the original Eurostar (Class 373) added, in the original livery and the e300 refurb livery. I understand it has been difficult for DTG to obtain the license from Eurostar, but they managed to get the BNSF license! Not only that, prior to obtaining the BNSF license, DTG still made BNSF routes and locomotives, just without the logo. So why can DTG not make it without the logo? SNCF has (or had) Class 373's, patched with a SNCF logo. Perhaps they could work with SNCF to obtain sounds, etc. An unbranded Class 373 would be better than no 373 at all. The class 374 is a nice, modern version of the Eurostar, but it is too similar to the BR Class 403/406 in my opinion, and it would be nice to have a new experience. IMHO, the 373 has much better sounding traction than the 374. Come on, DTG! Everyone knows we need it now with the SEHS expansion! Disclaimer: I do not own the photograph, credit to the original owner.
For bnsf, that's cuz dtg did have some sort of license. The bnsf logo could only be in the us while outside the us, no logo, only the colors I believe. That was the deal. Eurostar won't give the license at all so dtg can't make anything, so no train, no livery. Dtg aren't going to make unbranded stuff in tsw at all. In tsc, it wasn't really that important to have branded stuff or not since there were several dlc that weren't branded.
For me, this route is sorely missing the extension to London Victoria, Dover, Ramsgate and Sherness. I really want to get full commuter train services. When this happens, it will elevate the route to the rank of the best. I really hope so, because they did it in TC, he is incomparable.
If you want to be pedantic, what you're asking for is the Chatham Main Line, not an extension to SEHS. As great as that would be (CML was my first experience in TSC, and probably my favourite overall due to the variety) it would be a massive expansion (the only part of the CML that is currently shared with SEHS is the Rochester-Faversham stretch) on a line which the priority should really placed on the Javelin and HS1 (so the loop-around from Ashford to Faversham, either via Dover Priory or Canterbury West would be a better choice for service completeness).
If this were to happen then you have a busy Ashford international station with Eurostar Class 373 stop and go there then dash to Ebbsfleet at 185 mph (300 kmh). Class 374 is a 16 carriage version of SFS Stuttgart Ulm DB BR407 and HDU merged form HDBU DB Baureihe 408. Spoiler: HDU and merged form HDBU Full names Hollandstrecke Duisburg Utrecht merged form when combined with HRR Hollandstrecke Duisburg Bochum Utrecht
Whether or not we ever get Eurostar has already been discussed to death elsewhere and the best that can be said, is unlikely.
the 374 is a version of br 407 but there are technical differences such as the security systems which are placed in different places and the E 320 from Eurostar can go to Belgium and the Netherlands with the security system of belguim and netherlands
Personally I think it would be better as a substitution for its own Eurostar route. But considering the 374s have mostly replaced the 373s, it would probably be better to have the 373s as a dlcs for the Eurostar route, then have the 374 layer in SEHS, and the 373 as a rail tour. But it would be nice to drive into the rest of st Pancras as it feels empty