>>77044435First 2 seasons got that intro with all the flashing lights. Some of the 1st season episodes too have that happen in some scenes. Songs get better (in my opinion) in the later seasons as I start being able to actually understand them. Leans a lot on gore in the earlier seasons, but they do have gags in every season beyond that. Really enjoy them. The episodes aren't all that long, so why not watch them?
As for the story, plot stuff just simmers in the background and only comes to the fore in a few of the episodes each season. The Doomstar Requiem seems like it could have changed the status quo and put plot on the forefront of everything for the possible final season, but they could do what they did in the beginning of the Doomstar Requiem where the band just ignores all the tension they were experiencing at the end of the last season and just goof off.
Still the last season is supposed to be like 6 episodes long (if it passes), so it doesn't seem like there'd be much of a problem if it gets a bit more plot heavy (as much as the musical did, anyway).