DI will always crud up the intake and valves, single or dual injection. The "I DO CARS" guy has torn too many down, even low mileage ones, to prove that point.
The dual injection engines will be some cleaner, but nothing like port only injection. DI still has a tendency to cake up the oil control ring just because of the high compression and associated blowby.
I will own a DI engine when I absolutely can't find anything else to buy.
We drove my wife's 2013 Ford Edge 3.5 to Asheville and back today. It had a 6 speed auto with a "sport" mode, meaning, you select a gear, and it stays in that gear until slowing down to 1000 RPM or you shift it up or down manually.
It climbed Black Mountain like a champ.
Unlike my 8 speed, it will not downshift (unless you select a lower gear) no matter how much throttle you give it. I like that.
I haven't driven it in a while, and forgot how well it runs for a 13 model year old car with only 67k miles on it.
While driving it I was thinking how I hope it last for many more years so we don't have to buy any of this new over engineered stuff.