Are unique magical systems necessary?

Is uniqueness absolutely necessary for a magic system to feel well written? Let me explain: in my macro-setting there's only one magic source – essence – innately present in everything, and the several magic system I designed are all fueled by it. In this sense, they are more like schools of magic than independent magic systems, and the reason why you can't replicate the effects usually associated with a certain kind of magic while practicing another is because no one has found a way to do it yet, but it is theoretically possible. Some of these magical systems are considered separate and independent mainly because the practitioners of one don't want to be associated with those who practice the others. The key differences are the kind of effects that you can produce, the amount of essence that you have to employ in order to cast the spell and the prerequisites to fulfill. Other than that, they are pretty similar.

Some examples of magical systems that I use: - Thaumaturgy: the caster directs the flow of his own essence with ritual words, gestures and catalysts to construct a spell that warps reality. It is by far the most versatile and you just have to follow the instructions, you can cast the spell without knowing what it dies, but it also requires a lot of preparation to cast, and a lot of experimentation and study to invent a spell. - Sorcery: similar to thaumaturgy, but the caster forgoes any preparation and uses their own body as the foundation and conduit for the spell. It requires some degree of imagination to visualize the effect to manifest and some practice to prevent undesirable effects, but the output is almost impossible to predict, you usually just wing it. - Elemental magic: it requires a strong affinity towards one element, so strong that the caster is basically unable to use any other kind of magic. On the other hand, the caster can freely control their elemental essence and quickly construct spells that cannot hurt them in any way. Two elementalists with the same elemental affinity can be hurt by the opponent's magic, but they can also try to steal each other's spells to reflect them to the sender. - Curses: used to manipulate someone else's essence and exploit the strong connection between the essence and it's host to manipulate the host's physical and mental state from the inside. It's a parasitic form of magic used primarily by demons that bypasses magical defenses if used correctly. - Druidcraft: the caster infuses an already existing physical phenomenon with their essence in order to influence it by manipulating its natural processes. By administering a sufficient amount of essence, one can speed up certain natural processes. Alternatively, by producing a certain physical effect at a small scale, one can convert their essence into that physical effect at a larger scale.

Do they feel to samey to you? I've been writing my stories always thinking that as long as the flavor felt somewhat fresh and new, a new magical system could be justifiable, especially if it's used by a completely different group from those encountered previously. For me, more of the same is not a big problem, sometimes it's a good thing as it allows you to make a direct comparison between two characters in a confrontation. It's also nice to write about characters that try to come up with a solution to the opponent's magic by relying on their knowledge of the commonalities between the two kinds of magic, something that would be almost impossible were they completely different.

Let me know what you guys think.