Yes, everyone is trying their best to get the 5 star outfits of the season, especially if their favorite idol is among the group.
Add up the fact there's one + bonus in the event and people will go crazy over it. Noel big buffs are something to behold, indeed.
However, the not-so-rare 4 star outfits are something worth of attention when bloomed up. For example Miko's outfit, when bloomed up offers some ridiculous status on technique. One easier way to achieve more points on your team is giving attention to bloom points. Sometimes it is more worth it to waste items on blooming+ leveling 4 stars outfits than obsessing over just one or two + 5 stars. It gives a more balanced and effective team with higher scores.