I doubt they'll go back and add Trust/Duty Support to the MSQ Trials just because they won't improve the AI of the trusts to do more than the absolute bare minimum. That would mean changing mechanics as, again, FF XIV's trusts are barebones in terms of understanding mechanics.

Instead of Leveling roulette, the current relic should've used Trial roulette instead to incentivize participation. All Leveling dungeons have duty support now I believe(?), so there wasn't as much a need to re-incentivize it. And Trial Roulette rewards are already pathetic in comparison to the other roulettes, especially as they add ilvl sync to trials, making them take longer than say Normal Raid.