I watched it and I personally thought they did a pretty good job. Strong vocals, a unique style, a neat and punchy bass line and well written lyrics. Good luck to them.
I'm sure it's a personal thing; but there is so much good music out there today that imho, a 3-piece band is unlikely to make an impact, there's simply not enough instruments to produce a full satisfying groove when playing live. The musical diversity just isn't there.
Imagine (no pun intended) the Beatles on the Ed Sullivan show with George or John missing; "thin" would have been the result.
An exeception are bands with a keys player; ELP comes to mind.
Interesting enough, in my youth when we frequented night clubs there was a
two-piece band that really got us dancing; a drummer and a keyboard player. I think he played bass with his feet.