Starship still has a lot to improve but I think the best thing about them is that they NEVER miss in terms of music, at least you can always expect quality from them and you won't be disappointed.
Usually, they aren't cheap with their groups either, you can always expect highly aesthetic MVs and nice styling for the members, with great choreo.
However, sometimes their creative department get so freaking lazy and get way too much "inspo" from other groups, to the point that looks like they are copying. Fortunately that tends to be the exceptional times, but when they do it, its awful.
Overall their groups all have a distinct sound and image, and are well promoted, which explain why they are all doing so well. Cravity imo is the only odd one, imo it doesnt look like they have found their identity yet at all, but I guess it took a while for WJSN too, so there's still time.
We can't forget Boyfriend though. Sadly, they are usually forgotten by the kpop community even though they had likeable members and great music and concepts. The fairytale one still is one of the best in kpop imo and Witch is undeniably one of the best halloween songs we will ever find in kpop. Starship just seemed to gave up on them after Monsta X debuted and shipped them off to Japan...