So if I hated the SP in MW2, I will doubly hate this?
I can't really answer that since I loved the sp in mw2.
What I will say is that is clearly a game made by people who sat down and tried to ape a COD game without the talent, graphics, design chops, or controls to actually come anywhere near the goal. The attempt is so bad its laughable in fact.
Also on a side note here is another example of gamers being dumb. There are a lot of complaints about the length of Homefront and there was a story today from THQ saying that maybe Homefront 2 will be longer.
The problem with any game is never the length. If a game is 6 hours, or 10 hours, or 20 hours. That is what it is. As long as the content is interesting and fun over that time, length doesn't matter. A game should be as long as the content within it justifies. The problem with this game's sp is its shit. 8 hours of shit or 20 hours of shit is no better a proposition. In fact I would argue this game is too long. It wears out its welcome quickly.