1. Well you're only a nazi if you only like the first 3 albums and nothing else. If you like somethings else which you seemingly do, you're not quite a "nazi" as under @kaisin's terms.
2. I COMPLETETLY agree. In fact, this is probably going to be the best song from the album played live. This had the potential to be the best song on the album, however even if it wasn't ruined by production and electornic drumbeats Birds is still a better studio song.
3. Sorry, but most of Coldplay's "pop" is anything but mainstream. Just saying. (PoC is the only one that you can really call "mainstream pop" (that's undeniable, even though it does differ a little bit) and HFTW comes in second place for that type of song but honestly that song is so creative and experimental instrumentally that it can seperate itself from the general category of "mainstream pop". :P)