- How effective is this particular style in the OU metagame?
effective enough, but not in the top seven playstyles. dragon spam used to be really great in late bw1 and even early bw2, but with the advent of more steels and more scarfers it's becoming harder and harder to gain the upper hand by simply spamming outrage and draco meteor.
- What makes Finchinator's team "stand out"
honestly, this is one of the most standard dragon spam teams you're going to find. the only really original or innovative moveset is the garchomp with fire blast, which ctc popularized, and then haban berry, which is interesting, but not necessarily that useful imo since specs draco meteor latios or cb outrage dnite is going to be ohko'ing you anyways. sash is better for rockschomp.
- Are there any weaknesses you can identify in the team?
yeah. deoxys-d + bandtar basically means gg for this team. get rocks up and maybe a layer of spikes, trap and kill your only revenge killer in latios, sweep with something. options include your own latios, keldeo, breloom (get dnite out too for this one), and even gengar. really simple and effective way to demolish this team.
- How are some ways the team can be improved within the parameter? (at least 3 Dragon types)
i would change garchomp's item to a focus sash, as previously mentioned, and also swap the two movesets of terrakion and latios; namely, change terrakion to a choice scarf set, and latios to a life orb set. this means that now your only reliable revenge killer isn't going to be huge pursuit bait and you can still have a utility life orb 'mon waiting in the wings to open holes or clean up late game.
- How are some ways the team can be improved outside of the parameter but still along the guidelines? (2 or so Dragon types)
to me, garchomp really stands out as the pokemon that seems out of place on this team. sure, rocks are nice and all, but to me the team needs more than that in order to achieve success. replace it with deoxys-d, the best hazard setter in the game, and then make a few more changes: scarf latios ---> life orb gengar, life orb terrakion ---> choice scarf terrakion, cb dragonite ---> sub cm keldeo. now you're good against pretty much anything anyone can throw at you, besides all-out rain spam, which is broken anyways (refer to auto weather poll thread for reasons on this).
interestingly enough, finchinator posted above me while i was typing this out that his team originally had deo-d over chomper, so i guess that further proves my point.
once again, i'd like to congratulate finchinator on his success in this tournament. cool team, too.