So, with the ARC being out for a good time now, can we just take a break for a second and appreciate just how awesome of a ship the ARC is? It looks great. More importantly, every single pilot has seen competetive play at some point with reasonable success, but without creating massively bad gameplay experiences.
Norra has always been well appreciated and has two good builds as BB-8-ballerina or R2-D2 regenerator. She has seen the most consistent amount of play.
Braylen was destined to become a great stressbot-carrier and is arguably stronger than the Stresshog in that regard. It took a while for him to become popular, but he is undenieably powerfull. However, his pricetag prevented him from pushing out the traditional Stresshog, which is great for diversity.
Thane was popular for his great action economy in the early days of the ARC, but then was overshadowed by stress-Braylen. However recently he found his way into 4 ship rebels as relatively inexpensive damagedealer again.
And finally Shara, the bad egg of the bunch. At least that was the initial consensus - however she actually was part of one of the best finishes the ARC ever had!
The only other ship that sees this many pilots being played is the Jumpmaster, which is a lot more popular on a whole and therefor pretty problematic. The ARC is not dominating top tables, but it has realistic chances at getting there with the right builds. You can never be 100% sure what exactly the ARCs someone is playing are. It really is among the best designed ships in the game.