Even if they don't move anyone, this creates a lot of competition for limited spots. Hoglander, Sprong, Podkolzin and potentially Lek are all competing for similar spots here with Podkolzin having the edge in bottom 6 utility.
Also way too many of you guys are underselling Hoglander here. Yes he's small and can be better defensively - but he and Petey did really well in their minutes together and Hoglander is great at even strength scoring. Guys like Hoglander, Sprong, and Garland do so well at even strength such that they are absolutely pivotal in depth scoring when the PP dries up, just like in this last run.
This depth is really good for longevity during the season. Being able to spread the ice time out and not forcing 20+ minutes for Miller and Petey on multiple nights will seriously help performance going into the playoffs.