How childish. Is that really the way you're going to describe the debate going on in this thread? Because frankly, the people 'defending' Naughty Dog are primarily posting the facts to fight the rabid assumptions from the 'disgusted' camp.
1) The DLC gives you extra customisation choices, not a straight up boost. You do not get any of these things for free, you always have to forgo something of similar value from the free perks or weapons.
2) This has been the case for a long time in the PS3 version of the game.
3) You can use almost all the purchasable content in the preset classes.
4) You can do more than fine without any of the purchasable content.
5) This is absolutely no different from the DLC in games like Battlefield 4, which grants you more weapons and equipment.
This thread has nothing to do with people defending ND because they're ND. People are explaining the facts to combat the hyperbole coming from those with little to no experience of the multiplayer. We could have a discussion about whether this is a good practice. Instead, we're having a pointless argument of facts vs assumptions. Better still, posts like yours are basically accusing everyone fighting the fire as being so biased towards ND that we can't see the wood for the trees.
Do I like this practice? No. I don't. I'd prefer the content to not exist, or to be free. At the same time, as a long time player of the game, I have the context to say that it's not that significant an issue. There are so many precise analogues that no-one seems to really care about.