He's actually more correct (for the idea I think he has) its weight would be more emphasized the closer it got to the planet as in it would start to have one in the direction of the planet. Mass would be constant. Thing is...there is no real relation in distance in this game. So you could argue that weight is negligible or gets exponentially larger.
Since this idea is that it gets exponentially larger I am assuming the following logic behind the mechanics:
The closer a titan is to a planet, the more thrust / energy it uses to maintain orbit, making it slower to accelerate. (rotational speeds wouldn't be affected, as it is strictly mass dependent not weight and I would argue rotational thrusters would be independent of the 'drive')
There is some value to this idea, but the problem is...how would the AI handle it, and would it be 'fun.' I'm thinking both of these would be a problem. If your titan chose to go closer to a planet to chase something down, you might be pulling your hair out to get it to come back. I already have this problem with AI and mines (that they can clearly see).
Also, it would appear that Jumping is pretty mass independent, and even if it isn't lore-wise, it would seem prudent that calculations are done by those to make sure that everyone lands in the right spot at the right time.
There is some worth in your idea, just don't think it will work for this game.
