Pistons washed...

I have a 2015 V with 201k on it. I bought it about 140k a few years ago and it's been a good car.

Currently I'm chasing a slight rought start in the morning. It's not rough like I see from the cars with the bad head gasket issues but it does have a little shake on the first startup. I don't know if I'm over thinking it or hopefully catching something before it becomes a bigger issue.

I pulled the EGR, EGR cooler, intake, etc and cleaned everything and changed the plugs about 7k miles ago just to see how it looked. I cleaned up a lot of carbon from the intake and EGR but it didn't seem to make much difference on startup.

I do have a very slight fuel smell on the oil dipstick that I don't remember in the past but I've seen a lot of people say that can happen with the hybrids over the winter. It is due for an oil change now. I haven't pulled the injectors out yet but my guess is they are probably carboned up if the intake had that much carbon.

I pulled the plugs out last night and scoped the pistons. Pistons 1 and 4 are definitely cleaner than 2 and 3 but they don't look HG clean unless it's a very small leak at this point. I find it interesting that it's the two outer pistons and not 1 and 2.

I have a video on my photos but it won't let me link it because I haven't posted enough. Haha. I've lurked here for years though...

Any thoughts?