Thanks Rayc.

I have been trying to solve my problem on the vocals since the update of Logic Pro X to 10.3. In this version, they took off the reverb PtVerb and replace it with Chroma Verb. The latter is actually better than the former but I just need to get to know more of it better. My prior mix of this song made the vocal sound as if it's coming under the ground.

Same for the solo guitar. You're observation is right. I'm still trying to learn the new reverb as well as how to mixi vocals properly. I'll try your suggestion on how to fix this.