Don't like the new name. Don't like the wrestler's look either. Sorry.
When he debuted *spoilers* he didn't even have body paint on. He had black trunks. Bland and boring.
Finn Balor? I wish the name was more interesting.
Look at other guys in NXT that were given good new names:
Leo Kruger, for example, was a great name for the gritty 'big game hunter' character. Makes you think of Leo, like a lion and Kruger like Freddy Kruger. It's a solid name. Sadly, WWE didn't got with it on the main roster so they made him into a party dude. But the point is the name was better.
And even Sami Zayn. It's not El Generico, but since he's not wearing a mask Sami Zayn is a great name. Really fits him AND rolls off the tongue.
Adrian Neville works. It's no PAC, in fact, it's better. It's a name and it works for a British guy.
Tyler Breeze. Perfect. For a self-absorbed model/wrestler the name works perfect and is easy to say.
Kalisto. It's not Samurai Del Sol but is is a good alternative. It sounds pretty badass.
But these new names for KENTA and Devitt, not so good.
KENTA now known as Hideo Itami isn't too bad. I like Hideo more than Itami. Tajiri was an excellent name for that guy but it actually was his name so it can't be repeated better by anyone else. If Yoshi Tatsu had not been in WWE I think KENTA being known as Tatsu would be great. Tatsu is a strong sounding Japanese name and I think if he was a one-named wrestler before he should remain a one-named wrestler. Perhaps he will drop Hideo or Itami before he moves up to the main roster.
As for Devitt becoming Finn Balor. Just doesn't look good to me. They should have kept the random name generator rolling: Frankie Toxic, Zip Dressler, Drago Cross, even Devgar Frett could be better.