No? Well, then here goes another (me): I will support and buy any future submarine simulations, no matter if they come from UBI or from another company

.
Why? Because submarine simulations are rare, and companies venturing into them even more rarer. And if they do not get some sells and support, they will never think of doing further -hopefully better- titles. Think of it like this: To get a good soccer game from EA Sports you just need one release. To get a good submarine simulation, you need sometimes many releases. That reflects the extra cost of developing products with lower sales figures. But still better than anything.
And let me end by saying something else: If you want the perfect, bugfree submarine simulation of the Pacific War, you are a lucky man. You can get for 10$ SH1 on e-bay right now. Want the fancy SH4 graphics also? Then bit the bullet and support SH4 making constructive critizism and buying a copy. In the end of the day, SH4 will be fixed and we all will be having tons of fun, that's for sure.
And anyway, all you guys who want to cancel the order are in fact experimenting the hardcore realism of the Pacific Campaign in the early years: Frustration. So it seems that in the end SH4 is for you all in fact a good and true-to-life simulation, isn't it?