There are also other movement speed increasing effects available as well depending on party composition. IDK, I don't really think this is a huge issue, and it's worth noting that Sortie contains more things than the player can do in its time limit, and so providing a signficant movement speed increase that everyone can use may have balance implications that would keep them from implementing it. I'm not saying it's a bad thing (It isn't, from the player perspective

), but it potentially means higher galimuffin totals per run and they probably don't want players to earn them faster than they do now, so I think it's unlikely that they would make this sort of change. I could be wrong, of course. But given that we probably aren't going to get another big new battle content (at least, not anytime soon), they want this to last as long as possible. And that means not making galimuffin farming faster.
I'll give t his a like because I and I'm pretty sure anyone else would like any movement speed increase in any sort of conditions. But because this could potentially increase farming speed, realistically I think it's a non-starter for SE.