In short, Arlecchino's early constellations are quite worth investing in. Except for her 4th constellation, which doesn't provide a significant change or increase in damage output to her kit, Arlecchino's constellations all focus on significantly increasing her damage output.

Based on the amount of Bond of Life Arlecchino can easily gain and the buffs from her passives, it is safe to say that she will likely be an amazing damage dealer. That said, it is difficult to compare her with other units on the roster since there's still time until her official release.

Arlecchino is a great choice if you are planning to heavily invest in her, including her constellations and signature weapons. She is not a free-to-play friendly character and is harder to play without a shielder or her C1.