I kinda feel two ways about this. On one hand, they had pretty solid workmanship as far as I recall, but on the other hand... they weren't really invoating in the motif department. For some background for those who weren't there....
Rose melody was pretty popular when I was a young lolita. Back then, the english-speaking lolita community was still pretty young (as in a lot of people in the community were young, but also the community was still not that established). Initially it was so hard to get lolita items that a lot of people were making their own versions of things, and for a few years the community had a very lose stance on counterfit items. Because of this, and because things like lolibrary didn't even exist yet, a lot of what Rose Melody made that is of questionable origionality flies under the radar.
The print in the lower right corner is not by Rose Melody. This print is by the also defunct Korean brand Strawberry on the Shortcake. Rose Melody stole their artwork and make replicas with it. The real SotS print is so rare, the only photos I have are these tiny ones.
The swans with the brand name under them come from the metamorphose logo. Other things in that print are likely stock graphics, but the choice to use the exact meta swans specifically in a border print like this when meta had already done border embroidery pieces with those swans is a choice.
Toe shoes in screen print or embroidery as a motif was also well established by ST/ET/ETC at this point
The chandelier series was less a direct copy and more an inspired-by... this screen print AP dress was popular at the time, but the screen print-on-velvet AP was doing was notoriously hard to do, so when people tried to copy thigns like this, they frquently did embroidery.
This one generally isn't seen as particularly problematic, it's just kind of an example to show how pretty much everything in Rose Melody's art catalolg is either directly stolen, or remaking existing things with likely stock embroidery graphics.
And yeah, we can say there is nothing origional in lolita. However, this was early enough on in prints that a lot of motifs we see now hadn't been done yet, so it's likely that it was intentional. However, it also was culturally normal in lolita at that time as well.
Rose Melody is one of those brands that is very much a product of a very specific niche that existed in lolita in a specific time. As long as there was a high demand for this look and low availability, they did pretty well with replicas and look-alike designs. But once more competition entered the market and the English-Speaking lolita community shifted more towards orig work and OTT sweet prints, they lost popularity in that market. I think if they had worked with an artist to actually design their own works, they could have potentially held on longer (maybe they didn't want to, I don't actually know why they closed), but I think they are one of those brands that is better in nostalgia than they might be if they existed today.