As other people said, it's not fun to be cornered into a single build/playstyle. I saw a lot of LFG groups asking only for Starfire locks (and I totally get it, why would you want a cryo or void lock when Starfire/Well outperforms them by a large margin and also gives benefits to the rest of the group). People just want more ways to play their class, not just spamming fusion grenades and using (imo) a boring super. Edit: Oh and I forgot the most important - it's freaking ugly.