They can't develop the engines they're using right now. Nothing is said about grabbing a bunch of money and developing the new spec turbo engines. You can't come up with an engine from the blue in the end of the season-start of the new season couple of months...
They will, its still a V configuration. The I-4s are what sound like poop when revved to the moon.
I learned something interesting watching free practice on sky at the weekend. The teams currently have to pre-select 30 different gear ratios for the season right at the start which they must then choose from for each race, but when the new engines come in they will only be able to pre-select 8. This could create some very interesting situations.
(they will still be allowed to change the diff ratio? right? if not some will look foolish in monaco, and other will look foolish on monza...)
The gear ratio stuff is especially strange. Doesn't changing the gear ratios just mean you just stick some different numbers into the laptop?