D&D 5E - One of my players married a beholder, help!?

Humanoid, single central eye that's antimagic or something special, and four stalked eyes that each can look in independent directions. Named-level adventurer, Scout specialist but really able to take on just about anything.

Does it need to be balanced for PC use?

Assuming so, core features are:
Antimagic eye: 1x/short rest, can project an antimagic cone from her central eye (as the beholder feature), with a length equal to Proficiency Bonus x 5' (starting at 10 and ending up at 30'). The antimagic cone lasts for 1 round per point of Constitution modifier.
Advantage on Perception checks involving sight, and on saves against effects that cause a Blinding effetc. (eyestalks)
Disadvantage on saves vs. gaze attacks (eyestalks)
Human heritage: May take a +1 to 3 separate ability scores at character creation (beholders have no major stat buffs, so went with human)
Darkvision 120' (as beholder)
Aberration-blooded: Counts as both humanoid and aberration for the purposes of spells, effects, items, and class abilities. (mostly fluff?)

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