Symphony of The Night got it right, you were able to go to almost every area of the game from almost the start of the game, we need this to come back and not linear progress such, finish library to go through chambers, finish chambers to go through catacombs e.t.c.
We need freedom of exploration and more platforming/puzzles!!!
Also SotN battle system, was having the special attacks for the weapons, which was unique for each weapon. Why not having something similar? Let's say a combination of the cross with the attack button or buttons, resulting in a special combo attack and to make things more interesting, each weapon would have a limited use of that combo, so that the game want turn a peace of cake, that you could restore at a special location or from a merchant, if there is one and you could even upgrade it to more times of use, by equiping it with some special jewels.