You will find chain nuts who can pick your chain apart. It looks "OK" imo. You said all I need to know..."it cuts well". "Cuts well" means different things to different people; a matter of preference.
I hate grabby chains with a passion so I would not take any off the rakers unless absolutely necessary; if it "cuts well" leave them alone. When the chips get small or turn to dust you will know when it is time to take some material off the rakers. If you touch up the cutters, do a couple test cuts before you decide to take the rakers down.
Ok guys a few more pictures, good as they get lol. I did a bit of cutting with it when I got home. It works nicely. 18" oak. Didnt have a thing bigger that was hardwood laying here atm. I was happy with the chips, I noodles a but with it in some poplar, full bar no issues. I hit a nail with it last time I used it. Only a few cutters were nicked up. If I hit anything else this week it will go on the ginder and get evened out.For the 390 I'd definitely be taking the rakers down, and quite a bit too.
I bet it cuts a lot faster. You could also make the hook a bit more aggressive, but you will loose some durability and with frozen wood right around the corner I like a strong working corner.