Well in the next few weeks I'll keep trucking at it and keep some of the things you said in mind! Such as the game getting better with the newer upgrades and what have ya.
Also to be honest, I think I'm wrong with my percentage, I'm only at the second boss (though I have gone back and played all the previous levels on the hardest difficulty available at the time). I'm thinking that's partially my problem. I think if I want to enjoy it as much as I possibly can I should just forget "100%ing" it and just play the story.
Stay tuned for future Castlevania articles, my final opinion may have changed!