On Changing 5e:
I'd remove bonus actions, rebuilding specific abilities to capture what they are trying to do. For instance, healing word could let heal someone and include a melee or ranged attack as part of the spell.
Bonus actions add complexity that doesn't need to be there. I like keeping things streamlined when I can.
I agree that in general bonus actions aren't strictly needed in the game, but I am concerned about whether they can really remove them
and maintain backward compatibility.
The main benefit of bonus actions is that they provide a simple rule to prevent using multiple special abilities in the same turn.
But of course, if each and every one of those special abilities became a
new specific "action" (in the standard sense of the word), then you'd still be prevented to use more than one in the same turn. What you would lose, is the ability to
combine the special ability with other basic actions.
Let's see the case for a
bonus action spell.
In 5e you can:
1- attack and cast a bonus action spell
2- cast a cantrip and cast a bonus action spell
3- dash/dodge/disengage/help/hide/use an object/else and cast a bonus action spell
If
Healing Word was changed to use a regular action, but to include a weapon attack, then the only thing you would still be able to do is 1.
To be honest, I wouldn't mind if that was the case. Sure it would be tactically more limited, but it would also be more simple, like in 3.0 and older editions where spells were always at least a standard action (except maybe
Feather Fall and other reactive spells, but that's another matter). It would also get rid of the "cantrip only" additional rule, which frankly always slightly bothered me.
What about non-spell
special abilities using a bonus action?
There is for example the Rogue's
Cunning Action or the Bard's
Inspiration. I am afraid they would all need to be addressed one by one, and decide whether each one should be turned into a non-action and thus stack with everything (this might be fine for single-classed PC, but may become overpowered in multiclassed PC), or an action and thus stack with nothing (but then it would become underpowered, so the current version of the ability would need a bump), or something more unique and thus stack with something only.
Then there are also some
non-special abilities which use a bonus action.
Notably
two-weapon fighting: maybe this should simply become a new regular combat "action", that allows a secondary attack in addition to your normal number of attacks.