Lol it's crazy to me that an addon w/ SO much customization doesn't allow you to choose the type of tug you want to use from a list of tugs that fit the criteria for your plane/gate. Instead, we're stuck flipping a coin to see what type we get.. so dumb lol Hopefully, we can get that option *soon*, but a workaround would be great in the meantime.
Silly me to assume users would like to simulate real life, where you ( the pilot ) surely don't have any saying which kind of vehicle you'll find on airports.
You get what they have, which is why the choice is random, to offer so variation to simulate the fact that, maybe, some equipment might not always available or all the trucks of one type are in use. So, as long the criteria are correct, you are always supposed to get a truck that is appropriate for that airplane.
Have you found a case in which you were getting the wrong vehicle ? Your wanted to remove the towbarless truck for the Fenix but, since that's the only towbarless truck we have NOW, if we prevented it to be used on A320-class planes, nobody would ever get to see it.
We already confirmed multiple times we'll add another smaller towbarless truck, so the larger one won't appear anymore on A320-class planes, we already had that model in P3D, but we don't want to recycle it in MSFS, so we need to remodel it from scratch.