I got 17/24, and disagreed with the analysis on a few questions. Btw, there were a lot of places where it said raising when it should have said betting.
1.1: I prefer raising to 4 bb instead of to 6 bb. I'm not that concerned about seeing an extra call or two. These will often be with dominated hands which will pay off my TPTK.
I think folding would be terrible. It would leave so much money on the table. Limping also seems clearly suboptimal. I'm much less happy about trying to get value from TPTK in a limped pot, and limping invites players to overlimp. An overlimp-reraise is a possibility if you feel the CO will often raise after good players limp, but that's not my usual read on regs at this level.
1.3: While I normally bet something like 420 to set up a river push for less than the pot, there are advantages to betting 240 and it should not be dismissed so quickly. Players will bluff-catch much more often with a weaker pair when you make a bet which looks like it might be a cheap steal/semibluff, or where it seems you have to bet small to get value. I think starting with 240 may mean you get two streets of value from some hands which would fold to a bet of 420.
1.4: I prefer checking to a good player. I don't think betting 500 will get paid off by many weaker hands, since I think the CO's range is quite strong after calling a turn bet in a 4-way pot when not last to act. Should I assume a reg flat-called preflop with KQo? I think hands like KQs, QJs, and 99 are possibilities, although it's hard to see a reg calling a large turn bet with QJ when not last to act, and I don't think many regs would call a second barrel with second pair.
Betting "prevents our opponent from making a move?" If our plan was to check-call, then why would we not want the opponent to make a move? If the CO got there with 75 for a busted straight draw, we want him to bluff the river.
Pushing actually has some advantages, since I think a likely holding is AK. Some regs may fold AK on that board, giving us the whole pot instead of a split.
1.5: While I would fold, I disagree with some of the commentary. A good player should raise us with worse as a bluff some of the time. However, regs tend not to do this often enough so we don't need to pay off the raise. It's not that bluff-raising is intrinsically wrong, it's that regs have unbalanced lines which we can exploit by folding.
2.3: I think betting 500 on the river maximizes value against many fish, who are going to have hands like TPWK or second pair much more often than a good player would. Some fish will bet these hands if you check to them, but I think betting small gets more value on average.