Four Year Strong are one of my least favorite bands for that very reason. I started on track 1, and then found myself on track 6 before I knew it. I feel like a lot of pop punk bands like that feel like they have to have some sort of hardcore energy about them so much so that its annoying. Fireworks has that problem. Set your goals used to have that problem, which is one of the very reasons why I love This Will Be The Death Of Us. Its not too hardcore, its a lot of really good upbeat pop punk, progressive at times but used correctly.
But the band that has that problem the most now-a-days would have to be New Found Glory. Catalyst was a badass pop punk album that at least sounded unique, because on albums like those, songs like Truth of my Youth and I Don't Wanna Know can exist alongside each other. On an EP, maybe not. Whether the sound is too different or the message of all of the songs come out incomplete, two songs like those wouldn't necessarily work together as well as they could.
To keep this on topic (since I feel like I kinda lost it), there are so many bands that put almost the same song with the same vocal style and the same progression and the same drumbeat one after another and thats when albums fail. I am a songwriter myself and the reason my band All of a Kind will probably never do an EP is because EPs limit an artist to an extremely small sample where the songs have to sound similar to each other, or else they just sound like a mix.
My defense towards that is this: there are x amount of notes and x amount of possible progressions. Most of them have PROBABLY been done before and there's not much new to be discovered. Thats why the most important part of the song is the arrangement. Personally, I use the F power chord a lot (E-1, A-3, D-3) but I make sure that when I do use it, its in the right place, has the right amount of impact without sounding monotonous.
For me, the definitive album where the songs are finally making sense to be lined up where they are would be Folie a Deux by FOB. The songs are awesome on their own, but together the message of the album is almost subliminal its that brilliant.
I read a comment here by somebody that they "hope full lengths don't die out". They will not. At all. Even if sub-par albums get released, there will still be full lengths. Thats a fact, but the rest is entirely my opinion so no hating plz.
My lord I rambled so much hahaha. I'll stop here.