They are accurate, if obvious, statements, with exceptions to each rule.
Road vote: if there's a true horserace with two frontrunners in step with each other, I think an argument could be made that the more commercial title wins. Races that come to mind: Kinky Boots/Matilda, Billy Elliot/N2N, In The Heights/Passing Strange, Jersey Boys/Drowsy, Spamalot/Light in the Piazza. (Big exception: Ave Q/Wicked.) The smaller shows that have won were critical darlings, and there was no way Aladdin was beating Gents Guide, or Mean Girls was beating Ban'ds Visit, etc.
Voter attendance: Can't argue with that, but it's also a myth that "voters only see the nominated shows." Don't know any actual numbers, I bet a fall show like like Head Over Heels or Waverly Gallery was still seen by 50-60% of voters by the time they closed. Especially with the new rules, voters don't want to be "caught with their pants down" if a closed show gets a bunch of noms.
Campaigning: Like he says, campaigning is a way to remind people of the work –– but the work has to be good in the first place. A splashy campaign can't turn a "bad" show into a winner. Example: Beetlejuice has never been a frontrunner, and a multimillion dollar campaign to voters wouldn't have changed that.