I guess it's kind of predictable Yahtzee would devolve into one big cavalcade of breast & bottom jokes chasing each other like Benny Hill characters to the tune of Yakety-sax, but a lot of them fell flat because:
a. Lara underwent a full cup-size reduction for Legend (which was picked up as a news story in itself by many gaming and non-gaming media), in an offensively transparent attempt to play down accusations of sexism and feminine objectification. Unfortunately the fact that they keep her ludicrously long legs, waist and cupie-doll features undermines their effort since she's clearly meant to be a cartoonish figure and not a realistic representation of a female. They should have either kept her cartoonish proportions and extended it to other characters a la Team Fortress, or made her entirely realistic. Thus all the "big boob" jokes fall kind of flat when you realise the Lara of Legend & Underworld is a modest C-cup now.
b. The "boobs on the cover" jabs would've made a lot more sense if LARA'S TORSO WASN'T OBSCURED BY THE TITLE, which Yahtzee even illustrates, calling attention to his own nonsense. Look at the cover, you can barely see her tits! I'd say it's her midriff, hips and thighs that are more the cause of excitable teens' cold sweats in this case than her barely-seen chest.
c. ... They're just tits, Yahtzee. They're a normal part of the female anatomy. Why not criticise other games for showing impossibly muscular men on the cover with gigantic guns and rippling biceps or giant robots blowing stuff up on their covers? They're just as transparent as sticking a buxom babe on the cover. Besides, a preoccupation with Lara's figure is playing right into Crystal Dynamic's hands - a review that makes no mention whatsoever of Lara's appearance would've been refreshing, and it would've shown that their attempt to provoke discussion and attention had failed. It takes attention away from the stuff that matters - the gameplay.
d. "Anything more than a handful is a waste" is completely true - a girl with large breasts being with a guy who has such a myopic appreciation of them is a tragic waste. The spelunking joke: Jesus, if you think LARA's tits are big I dread to imagine what you'd think about Fuko, Merilyn Sakova or Milena Velba. Small reference pools in your porn, Yahtzee.
Yes I did make an entire humourless post about amble bosoms. I make no apologies for it, for the subject is very dear to me. Anyway, disregarding the boobs:
The criticism of Lara being an evil nutcase: when was this a point of contention? Lara was always a deeply troubled anti-hero motivated by greed with a death wish, she was never a heroic protagonist in the traditional cliche sense. That's what makes her interesting. It's as silly as criticizing God of War because Kratos is a freaking psychopath: that's point of the character. She steals stuff from ruins because she's a collector of fine artifacts, she kills rare animals because the Croft Family are English aristocrats who probably have a history of big game hunting, she kills her competitors because she's not quite right in the head. I'd take her callousness to endangered species and merciless approach to rival tomb raiders over her silly WOT AVE OI BECUM hand wringing in Legend any day. She isn't Indiana "It Belongs in a Museum" Jones, she's Lara "It Belongs In My House Displayed Between Excalibur And My Mounted Tyrannosaurus Head" Croft.
Finally, the fact that the games are just the same with a change of scenery: while progress and evolution is always a good thing, sometimes if something works well (or at least competently), it's better than ditching it for something that fails. Tomb Raider, for me, was always about exploring awesome ruins, soaking up the atmosphere and solving neat puzzles. The fact that the combat-heavy games away from ruins like Angel of Darkness failed indicates this is a major selling point for the series. It's more akin to those Flight Simulator games, except with a story, and set in fantastic ruins. Thus Tomb Raider always has a special place in my heart.