New monster's types for 5e

The type mechanic is nonsensical. I ranted about this numerous types. But now I am going to throw caution to the wind and introduce new types to D&D 5e because I can. I care not for how it disrupts the rules as written, because one of the guiding principles of this new edition is that the GM can arbitrate whatever they want to rather than relying on the rules to make the decisions for them.

I would introduce a few new types: biomechanoid, immortal, manifestation, sphinx, and spirit.

The biomechanoid type is adopted from Infernum. Biomechanoids are Giger-esque creatures that straddle the boundaries between constructs and living creatures in the creepiest way possible. In the lower planes, biomechanoids are used instead of conventional machinery and they are fueled by the tears of the damned.

The immortal type is adopted from the immortal origin in D&D 4e. Immortals are... not mortal. It is used for the many corner cases that wouldn't fit into the aberration, celestial, elemental, fey, fiend and undead types, but should be in a comparable type rather than shoehorned into construct or monstrosity.

The manifestation type is adopted from Relics & Rituals: Excalibur. A manifestation is a creature whose physical existence is caused by a powerful emotion, strong desire, etc.

The sphinx type is adopted from the Nefret campaign setting. The logic goes that: if dragon is a type, then so should sphinx. It generally includes creatures with the forequarters of one animal and the hindquarters of another: sphinx, naga, manticore, hippocampus, pegasus, peryton... even lamia and centaur, I suppose.

The spirit type is adopted from a number of sources: Encyclopaedia Divine: Shamans, Relics & Rituals: Excalibur, and OGL reprints thereof. The concept of spirits is universal in world mythology, so I shouldn't need to explain it.