At its core, gameplay feels like someone took DoS 2 and tried to make a D&D mod for it. So many reused resources and mechanics.
The easiest to understand example of this is the Firebolt cantrip. In 5e, it does 1d10 fire damage. It can light stuff on fire so long as it isn't being worn or carried by something.
In the game currently, it is basically a mini-Fireball with an AoE that automatically sets the target AND surface areas on fire. It does 1d6 fire damage instead of 1d10, I'm guessing to 'balance' the fact that it is the functional equivalent of a spammable level 2 spell.
These sorts of changes aren't there to make the 5e ruleset capable of functioning on a computer. It is made because Larian wants to make DoS 3, not BG 3. That want to reuse assets like surface areas absolutely everywhere, regardless of what 5e says about that. They literally named 'flanking' into 'backstab' because that's what it was in DoS, rather than the term used in 5e. They are trying to use Directional Facing even though the rules of 5e specifically reject it.
Do changes to spells and abilities need to be made? Absolutely. Even the original BG 1 and BG 2 series changes spells to work on a computer. But they changed them only when it was necessary for the spell or ability to function, *not* just because they were unhappy with the results and wanted to make the game different than the ruleset.
