I voted for leaving it as it is, but i also came up with this:
How about leaving trains as they are (the gap thing doesn't look cool) and instead create a special inserter-like thing that's a much more efficient version of a regular inserter, but can be used only for trains and only one can be used ...

How about leaving trains as they are (the gap thing doesn't look cool) and instead create a special inserter-like thing that's a much more efficient version of a regular inserter, but can be used only for trains and only one can be used by a train wagon. This "train unloading station" could have as ...