As to the transports - how difficult could it be to add the option "abandon transports"?
Its not about how difficult something is, but about how much time it might consume compared to the use for the game.
OB is not a fullprice game, not everything can be included. Thus the development process is a chain of decisions according to this.
Including stuff now into the finished game often consumes more time than one would think. For example
when the NATO symbols were demanded, someone stated it could done fast (Quotation:"My cylinder solution is couple of hours work in Ogre and hey presto NATO operational map").
In fact it took several days and much testing. My point is that we do not reject suggestions easily, but we know the effort needed and take it into account, too.