In 5e, disengage is an action. If you want to move away from an opponent and not provoke opportunity reaction attacks it's going to cost you an action, or a very specialized spell, skill, or feat. But in BG3, everyone gets two options to disengage as a bonus action, they can shove (push isn't a thing in D&D) their opponent or jump away. Also, where's the athletics or acrobatics checks to determine the success of this shove? If there is one, it highly favours the one doing the shove right now. Also, a successful shove action (yes it's an action) has a choice of moving an opponent (of up to one size larger) 5' (one square) or knocking prone; and not shoving someone 15' horizontally. Also, since when has jump become a bonus action disengage, because it makes action economy and disengage (or specific spells, skills, or feats) completely useless.
Shoving is a thing in 5e. PHB pg195
Using the Attack action, you can make a special melee
attack to shove a creature, either to knock it prone or
push it away from you. Ifyou're able to make multiple
attacks with the Attack action, this attack replaces
one of them.
The target of your shove must be no more than one
size larger than you, and it must be within your reach.
You make a Strength (Athletics) check contested by the
target's Strength (Athletics) or Dexterity (Acrobatics)
check (the target chooses the ability to use). If you win
the contest, you either knock the target prone or push
it 5 feet away from you.