This is really just the first wave you aren't excited about? Lucky for you, then! Wave 5 was the least inspiring wave to me. Wow....two fat turrets. What an improvement to the game.
The way I look at the ARC-170 is that it is such a swim army knife. It's got decent attack value and enough hull/shield to withstand a lot of attention. It's got a rear firing arc! It's the first Crew and Astromech combo, and might as well throw on that Torpedo slot there. The unique pilots all have some odd ability that doesn't scream broken, but is just waiting for a clever combo. I think it's done really well.
The Fang Fighter will have the largest competitive impact. It will be the Scum PTL ship with an ace that can rival Soontir Fel. The guy that removes tokens will also be used. I think it's a good ship all around and I like the attempt to bring back jousting. I think the mid tier guys will be fun to use beyond competitive play.
The Shadow Caster at first glance looks pretty gimmicky and just a way to make a turreted ship that isn't just another turreted ship. If you look at it, though, I think it's going to be a really cool ship that can do some crazy things. For one, I think Ventress being able to cause a stress every round is going to be HUGE. Yes, you need to do the mobile arc, but there is that modification that's not revealed yet that will surely give it as a free action. I think Ketsu will be pretty useful when loaded with the title and things like Fearlessness. So, imagine her having mobile arc forward. She goes and bumps someone. She gets to Barrel Roll them and they get a -1 Agility. She then fires at them at R1 and gets a free hit result added to the 4 dice (via Fearlnessness). Oh, if she hits again...she causes another -1 Agility to anyone else on her team left to shoot. Even the generics will get to be pretty cool with the mobile firing arc and two Illicits. It will make arc dodging harder to do and stops Auto Thrusters from working. The Cargo Dump is pretty cool, too. I think this is a ship that you can glance at and not be so interested, but I think if you delve a little into it, it's really good.