Well, I don't think I'm personally going on and on about tier lists as much as I simply believe GP is a weak champ. It's his jacked up kit that is just smeh. And I don't believe a game is lost because of a single pick. In the instance I've been talking about, I believe we needed a stronger pick. But, skip all that and lets talk about tier lists and the meta then.
Now, I generally don't get too sour when I see someone take an arguably weaker champ (based on some tier list or experience). I'm actually generally ok with that and its fun to play various champs in various roles. I personally generally dislike meta changes like dbl bruiser bot and just don't find them fun. No tier list involved there... just something I generally don't like.
I also dislike picks that force you into behaving a certain way - all really enforced by a champion pick. That's not to say some of those picks are bad; I just don't like em. For instance, a ww jungle means no pressure until he hits 6. Knowing that, lanes have to adapt and are typically put in a position of having ganks from the enemy team and none for you team. In short it puts you into a position where you can fall behind, but then have the expectation of getting back ahead once ww hits 6. Another example is ww mid. Sure, its a champ that you can pick, have good sustain and do fine, but you generally need a jungler's attention to make anything of that ww mid unless its you are up against a baddie.. Nothing really wrong with doing that, though. Just not my preference. WW mid isn't conventional, but it works and he can provide tanky engage for the team later. GP can win his lane and provide very little later imo.
But continuing in that, there are gains the team gets out of not just composition, but certain champs. For instance, a fizz that's either doing well solo or because his jungler got him ahead is a major threat to the enemy team in pretty much all lanes. A gp is a threat to the other mid laner and that's about it (sure, he has some minor power with his ult, but its just not that good). Anyway, the biggest benefit I'd expect out of a gp mid lane is for him to keep the enemy mid busy and unable to roam/impact other lanes. Except if its karthus, then he can still impact other lanes.... so the most I can really hope for is that karth it kept from csing and leveling a bit early/mid.
Anyway, here's where you START to get into tier lists, but also think about team comp. I can put champs into tiers based on how they would do in a certain role, vs a certain matchup, in a certain comp, etc. There's nothing wrong with that and its good to be able to think about all of those things. That said, some champs are certainly better than others at certain things. I don't get terribly bent out of shape when people aren't picking god tier champs in the slightest. A god tier champ might be rubbish when played by someone in our group. Not a big deal and nothing to be dogmatic about.
I guess my main thought is that I don't super care about tier lists (either?). I also agree that I would very much like us to think more about composition. That's more problematic when someone like karl can't muster the words "I'd like to play jungle," ofc. And when we have certain folks with us (eg that fella that went eve... idk, sy going whatever he felt like).
But here's where we hit some crap: let's say I've been playing support all night. I want to play top as nidalee for a game. OK, now we get some guy that has decided they want to play eve (nothing to do with karl refusing to say "I'd like to jungle" hue). Well, now I'm in a position of having to be like well... guess I won't play nidalee now (even though I've been playing support all night and just wanted to do one thing for fun...). So, I have to beg off and go play some other champ.
So, what should we be trying to do more proactively to get better team comps? Some of the MC folks just want to play w/e they want to play (I enjoying playing with those particular folks quite a bit less and don't invite them as often). Thoughts?