I think the figures are always kinda inaccurate. Remember the hardest bits and the longest parts of game development are story writing and scripts/voice over. It's a small location in comparison to most games so doubt that bit will take long. I think it'll be fine.
I don't want to be rude, but I must butt in here. This is absolutely 100% not true. May I ask how you drew to this conclusion? That is one of the simpler things, to an extent. Now what CAN what can happen is that because voice actors can be VERY pricey and some of them are rather... hmmm... greedy shall we say? Or have a huge price tag on their toes. It can be very expensive for them to re-read lines if they were given a script with the dialogue. So sometimes the developers need to go back and redesign the part of the game of where the voice actor made a mistake on the developers part. I know of one developer that this occurred to. I know what game, but I suspect it happen to many of their games. Many of them contain a **** ton of a dialogue. They also aren't Naughty Dog, whom I presume write the script before full development of the level designs and characters. Which is why it's so consistent. You might notice that they go back to foreshadow the events. For example if you go back to where Sully was shot in Drakes fortune. You'll notice that passport is actually there and rendered. I assume that Naught Dog starts on assets while it's being written. As for the developer I'm referring too. They are more of a... write as they go along kind of developer. They have an outline of what they want to do, but it changes a lot during development. The story goes in to so many directions but kind of shakes a lot of them off and goes back to the main theme. Theme is always important in game development. The writers are normally only slightly ahead of the development team themselves.
As for what is the hardest part of game development. Definitely designing everything to connect. Getting gameplay to be consistent and following the rules is a little difficult, but that's not the hard part. Polishing can be a bitch, there is no end to polishing and it goes on forever. Animations can also be very difficult, having to line everything up. Animators get paid a **** ton. The ones who work on fighting games get paid the most. Fighting games despite to popular belief. Is amongst the most expensive games to make. Which is why the content is rather low and there is a lot of DLC or releases of the game to recoup the costs and draw a profit. Capcom is NOT being greedy with those rereleases and some may think, but they definitely make their money back and then some.
I want to mention one more thing about narrative design (the writer). They have to rewrite segments and parts again and again and again. It's very heart breaking to have to rewrite what you've envisioned. Narrative designers need to be in constant communication with everyone and requires a lot of team work.
Want to guess who has to re-do everything if the level designs, game play mechanics, characters, or assets are changed? Hint... It's the person that uses the less resources, cheap to modify the work, and requires far less work or effort to change. Even if it's a brain twister with mental blocks. Can you guess it? It's a heart breaker.
For me personally. Coding with C# is the hardest. I'm literally retarded with that ****. Sometimes I'd rather get a wired controller and hang myself xD Okay not really, but seriously. C# is torture for me.
However I do have a couple things I'd like to address. First off, no this isn't more like Silent Hill than Resident Evil. I don't know how in the world would get that impression. Just having psychological horror elements doesn't automatically make it Silent Hill. I wonder if people who make this comparison have actually played or understand the Silent Hill titles. Yeah it does look like it was heavily influenced by PT but if you're basing the SH experience off of PT then I got some news for ya--
Thank you! I've been saying this on other corners of the internet and even pointed out that project Kitchen was playable to the press when P.T. was revealed. I definitely wasn't feeling the same vibe. It definitely felt more Resident Evil than Silent Hills, but of course according to the internet. We're wrong xD