I've always really liked this idea personally. I think it's something that is a very realistic addition in the future as it has been apart of surveys since very early Alpha days.
You spend a lot of time on your hoverboard and I think it would add some real dynamism into the travelling phases. I've seen a lot of people criticise the size of maps and the movement speed and I think this is an addition that would counteract that.
Perhaps it could go slightly further and if you were to land a certain trick you could earn a very small speed boost? Then again it doesn't have to be anything complex with a competitive advantage to it. It could solely be a show-off thing, or like I said earlier, something to spice up the travelling phases
I really love the hoverboard and think it's a real stand-out mechanic in the game and there's a lot of potential to expand upon it.
Yep. I wholeheartedly agree. Something like this will fit well in the style of the game. A trick or two would not impact gameplay at all and like you said make the traveling phases really fun.