Log-line is to Beaver as Cheese-line is to Mouse... I need to get out more

After brutal word-bashing sessions the log-line has been finalised and beauty has been formed.
Tissues at the ready? Read away:

Micetro are the most established rodent band this world has ever seen. They’re taking to the stage and ready to melt hearts, but will the crowds still go wild when a key member decides standing in the background just isn’t enough?

Beautiful wasn't it?

The main points I needed to include where  that they were mice performing on stage, that they're an established band and that the bass character wanted more limelight and less swaying in the background. With no real conventional narrative, it was a difficult one to create a log-line for.

Here's a few of the other ones I wrote out as I got closer and closer to feeling it:

Five successful mice take to the stage to perform a worldwide hit. But will the crowds still go wild when a key member decides standing in the background just isn’t enough?

- this one got the point across well but I felt like the characters needed some kind of backstory to make the audience understand the scope of it. So I came up with the next one shown below.

Micetro are the most established rodent band this world has ever seen. But one fame-hungry member poses a threat to the bands famous smooth groove. Will the crowds still go wild, or is this the end for Micetro?

- This one was better for establishing the band and incorporating the title but we didn't like the second half of it. So I combine the beginning of the second one and the end of the first one and connected them together to create the final result that you see at the far top.