Dramatically so, yes.

And why wouldn't they? The ONLY exception is when they're getting paid by another platform holder.

Indies are almost unanimously the same, but there are a few like Shovel Knight that ride on the low competition-high nostalgia Nintendo market.

It´s all about the best console in the market, so yeah

Outside the USA a possibility, in the USA, not a chance in hell. The 3rd parties know, a dominant system like the ps2 was, would be a death sentence to the gaming community in this generation. Because if that happened sony would be a arrogant piece of shit , like they were when they announced the ps3.
If anyone actually wants the ps4 to be like the ps2 in sales, then say goodbye to a competitive and growth in our beloved hobby. Any true gamer should want all systems to do well and not a one sided afair.

Yes, with Japanese games(leaving out Nintendo). For example, earlier this year, Shinji Hashimoto said that Square "wants to help spread more PS4's" regarding more unannounced PS4 games in 2015(E3 and TGS). Then later at E3, Tetsuya Nomura said "we wanted to give gamers something that would make them happy -- open them up, perhaps, to buying into the PS4" regarding the PS4 titles announced. OP said that Square announced FFXV, KH3 during E3 2013(also, Type-0 HD at E3 2014).

The PS4's growth widened the gap between Xbox since then, and as we know Type-0 HD bombed on Xbox(poor example since no one asked for it there), which is what we all expected including Square. It just comes down to remembering that PS, the Japanese console with worldwide appeal is a guarantee while Xbox, the American console is an option when it comes to Japanese games, and the sales reflect that. Of course, western games will be multi-plat.

Japan > yeah, for sure, Ps4 is the golden boy of japan.

western > no yet, but things can still change...

Also the Nintendo going 3rd party and releasing only for PS?, I don't even know where to start with how wrong that all sounds and non logical at that.

"atm 75%+ PC games already coming to PS4", double wut.

The amount of exclusive Japanese games coming to PS4 in 2016 is absolutely insane.

Well, it is the market leader and it's beating the competition 2 to 1. Traditionally, japanese games do a lot better on playstation consoles. I think most devs with a new IP will probably go with PS4 exclusivity just for the free marketing and sony is more willing to take chances with new IPs. So we should see a lot more games on the PS4.

Yeah, he's completely wrong but most of the good or notable PC titles like Killing Floor 2, Firewatch, SOMA, Darkest Dungeon etc. are coming to PS4 and that's what matters. 

Honestly there's a lot more to the games on PC than those you listed. Totally good more players get to play those games though, everyone should get to play all sorts of games from other plats tbh.