I might have missed one but so far the rewards seem to have skipped light armour rewards in favour of medium or heavy. One of last weeks had 2 armour bits in one lottery but both were medium. I'm also not counting cloaks as an armour type as those are the same for all just varying on stats.
Statistically this is nothing to worry about as the chances of actually winning anything are pretty miniscule and getting smaller by the day as s the level cap.
But nonetheless it would be nice to see some kind of rotation to the armour type instead of what appears to be a slide away from one particular type.
As we can see the number of people at the cap and adjust the number of winners upwards accordingly, the odds should be staying roughly the same. Though as I mentioned before, the actual number of characters that enter has a direct impact on the odds of winning. We just base the numbers of the potential number of entries.
Also, the gear choices are random. I actually hadn't looked at whether they were light, medium, or heavy. Just inserting random gear. So there is no 'slide away' from anything. Just me being random.
My assumption was that lottery prize pools were an automated selection process that just needed someone to hit the button at the right time.
Good thing about a humans in built rng is that it can, sometimes, be influenced or made aware that the randomness slants one way or another. I'll just tell myself my post had something to do with the gloves appearing in the list for the current lottery.