The biggest problem is that it took way too long to go anywhere and the old cast were sidelined.
- Dracula went from essentially being Satan in the first season to suddenly becoming a mopey depressive instantly following on in the second season and he spends the entire season that way, except for a brief moment during the fight.
- Dracula didn't really care about the "war" so it makes you ask why he even bothered gathering his people if he was that apathetic in the first place. The show even says this near the end.
- The main 3, while their back and forth dialogue was interesting at first, had the entire season play out in a library and bickered among themselves which got tiresome in the end.
- The sense of scale of the "legions of Dracula's army" taking over the earth was so small. You only ever see a few characters standing around, which is peculiar considering its an animation, they could have easily made it much larger - including the castle which after the teleportation scene seemed tiny by the end.
- Dracula's court generals emasculated him and he allowed it which made his character borderline pathetic, as I said above I think it's partially down to the amount of time they took rather than intention. It's like the story beats were overly stretched and left the characters exposed to different interpretation that went against the writer/directors vision.
- It was heavy handed how they wanted Carmilla to be the scheming "powerful woman," they basically made the males ridiculous to do it. i.e. Drac, Hector, Godbrand (whose VO could barely pronounce his lines.) It was too much and very obvious, they really could have done it in a much tamer way with better pacing that didn't betray the characters and inturn made her even more scheming and dangerous as a result. Saying that, I did like her character, I loved Carmilla in Lords of Shadow but I want to see her done right rather than force it into place.
- They used an entire 6 episodes to build upto the fight in the 7th, which was awesome while it lasted, but it was only 1 episode. The last episode was basically a loose setup and a goodbye.
I mean I understand to a degree why they tweaked Dracula because they want to make a show, they needed more characters to take part and they couldn't have him basically smacking everyone down, but... come on, this is Castlevania! They stripped the guy of having any drive and dignity but it only served to contradict his original hellfire intent to destroy everyone in the first place. They should have had him only partially demonstrate his true feelings rather than have freaking Dracula moping around his castle while his underlings talk to him like ****. At some points he genuinely appeared ridiculous. I could see what they were intending with his character arc, they had the ending in mind for him and it was genuinely good how they did it following the fight, but it was so brief. And that's the problem, the good bits were so brief.
The highlight of the series so far is the animation, especially the action scenes. I loved how they portrayed magic in the show, it was really well done. Also some of the dialogue between the cast was brilliant, each character had a distinct presence and personality. Though there were lines and moments that brought me completely out of the show, like the "middle finger" by Alucard at the end and Carmilla's "WTF was that" line. It felt a little amateurish in moments but overall it was very good.