Is there anything that cancels out Small creatures’ disadvantage to attack when using Heavy weapons?

A party member in a D&D 5e game I’m in is playing a halfling paladin. It occurred to me (for whatever reason) to ask what weapon they were wielding, and they said their main weapon was a maul, and their backup was a warhammer/shield combo).

Upon checking the Weapons table, I discovered that mauls have the “Heavy” weapon property:

Heavy. Small creatures have disadvantage on attack rolls with heavy weapons. A heavy weapon’s size and bulk make it too large for a Small creature to use effectively.

The player seemed to be unaware of this (a similar character in Critical Role apparently wielded heavy weapons without issue – of course, CR is not necessarily a perfect demonstration of the rules as written).

As such, I was curious whether there is anything in the rules (i.e. not homebrew or a house rule) that cancels out this innate disadvantage for player characters, other than gaining advantage from some other source in combat.

(Note: the issue has already been resolved in our game between the player and DM, so it’s purely a rules question.)

Does Levitate cancels inertia?

According to the spell description:

Levitate allows you to move yourself, another creature, or an object up and down as you wish. A creature must be willing to be levitated, and an object must be unattended or possessed by a willing creature. You can mentally direct the recipient to move up or down as much as 20 feet each round; doing so is a move action. You cannot move the recipient horizontally, but the recipient could clamber along the face of a cliff, for example, or push against a ceiling to move laterally (generally at half its base land speed).

Source: https://www.d20pfsrd.com/magic/all-spells/l/levitate/

My understanding is that while the description says you can’t make something/someone/oneself move horizontally through this spell, there’s nothing stopping the object from moving horizontally by its own device.

So, imagine the following case:

A drow runs at her maximum speed, and jumps over a cliff, activating her Levitate spell-like ability.

  1. Will the character’s inertia make her move horizontally, while she keep her altitude constant (or rising, or going down) by carefully using Levitate?
  2. If there’s no obstacle, will she even stop?
  3. How does that compare to Fly? (https://www.d20pfsrd.com/magic/all-spells/f/fly/)