That evil-smiling tree never bothered me considering Alucard can summon a friggin' COW with the shield rod. So it's not like there aren't any other silly ideas present in Symphony.
As for the other enemies, hey, the more the merrier. Just adds to the already unique bestiary. I do wish the areas themselves included better graphics, and maybe a new boss or 2. noobs across the world will forever wonder what that passageway at the castle entrance leads to every time they boot up Symphony on their 360s