How quickly are you drinking out of that keg? Most beer, in my experience, needs a period of conditioning to reach maximum flavors.
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I have a Rye beer I brewed 15 days ago. I kegged it after 5 1/2 days in the fermenter; I'm partially carbing it in the fermenter, so it was about 7psi when I transferred it.
I tasted it after 8 days total. Some rye flavor, but nothing about it that was worthwhile at that point.
I had a little last night again, after 15 days from brewing, and wowee! It's gotten just about to where I want it to be, though I feel just a little more conditioning will help--maybe a total of 3 weeks, maybe 3.5 weeks. I'm not drinking it now because I want it to condition before I start draining the keg.
I kegged a hazy ipa yesterday. Doesn't taste all that great yet, though it's not terrible. It's 7 days old, kegged it because I dry hopped and it had been 5 days and I wanted to get the beer off the hops.
I'm letting it sit. I'll try it again this coming weekend, see what's up with it. I expect the flavors to smooth out and be much better. Might be necessary to go three weeks, we'll see.