False. Plenty of champions were release before Team Builder was made. Team Builder just shoved the champion release week stuff under the rug (at least for those who used TB exclusively). Now ya'll are left trying to figure out how people survived release week without it. Not that most of ya are being very creative (or tenacious) with the options available to ya but eh. (Five-man blinds, solo blind, waiting for hype to die, customs of all sorts, dominion, etc, etc). Also you only need, at the very least, three people to practice ganks (Enemy team being two and ally team being one). Four/eight being ideal, and ten is perfect. Especially if your only aim is improving your reactions to ganks, or preventing them. Teamfighting can be practiced through ARAM (especially if you don't have enough for a full custom) as that's all ARAM is. The randomness may not net you the champions you want but the aspects of teamfighting are not champion specific.
Also what he means by wait times is the popularity factor. Release week drags out all those wanting to play new champions right this very minute and with TB you would have to wait for it to find ya a spot (between captains denying/kicking) in a team. Which (as it could be said for the most popular position types) may take a while (anything between 5mins to an hour). Plus there is a blind pick dynaQ that may or may not implement TB stuff (haven't actually read into it other than it being worked on) into. The dynaQ that we got right now is the ranked/draft version (and how old draft is better than the new one is beyond me) and its rather naive to think that those who frequent normal drafts (ie most of who are looking for a semi-serious game that doesn't involve LP loss/gain but still has a system close to ranked's) wouldn't ban the new champion.
As for your reasoning against bots, eh it's true to a point but at the very least it'll let you get a feel for how the champ works, for figuring out how to CS with them, and familiarizing yourself with ranges/skillshots. Once you go PvP with them you can more accurately gauge who works best with them, what match-ups are good/bad/decent, the champion's build paths, etc. Without bots/custom before an actual match your left having to figure absolutely everything out against an enemy that won't give you the leeway to learn. Plus there is a chance you'll ruin the game for at least four people.
