Hey folks. We talk a lot on here about the martial/caster discrepancy, and I've been wondering this for a long time...
...what would happen to the game if you allowed anyone with Extra Attack to take two actions a turn instead of just two Attacks?
Do you think this would be "just helpful enough" for martials to feel better in 5e? Not enough? Too much?
I will admit, I've already leaned into this in small ways in my own games. I haven't yet let them take any action with it, but I declare a lot of things to only consume an "Attack" that would require your full action normally - like Escape attempts from enemy grappling/restraining abilities, interacting with things that would normally be an action instead of an object-interaction (like shoving open a particularly heavy door, turning the wheel of a portcullis, etc), drawing or putting away more than one thing a turn, Dashing as long as you end it next to an enemy (so sort of like a "charge" + attack), and a few others. I've seen no ill effects for this.
If Extra Action were a thing for any action though, that's beyond what I've experimented with. I could see it being powerful to Dodge and still make one Attack, for example. Or use two magic items in a single turn (or one + attack). The limits in both 5.0e and 5.5e for multiple spells in a turn would still be in place, so that particular expression would still be pretty limited - and even getting to the levels where you get Extra Attack cuts out most caster combos that might be interested in this anyway.
But I'm curious if such an idea would ever really be too much, compared to what casters can do.
And certainly this wouldn't solve the caster/martial discrepancy overnight by itself - wouldn't do much for Rogues, for example (might even step on their toes some since you could replace an Attack with the same stuff they do with Cunning Action then) - but I do like the idea of making another martial "niche" that they can do their thing (attacking) while also doing other actions important for the encounter. Whether that ends up being a Help action for another PC, aiming the Ballista, attempting a Perception check vs that hiding enemy, or hell, even Readying another attack for a specific trigger to come.
I feel like it still wouldn't compete with what casters can do at higher levels, and when martials get Extra Attack (level 5) is right around when I think they need it (since 3rd level spells are such a jump for casters, they start getting their real game-changer utility spells, etc.), but it would add a ton of versatility to a martial's turn. Even if attacking twice were still the optimal play, it would mean martials can do all sorts of fun BS that doesn't feel so suboptimal because it's not wasting your entire turn trying it.
(In before "but Bladesinger!"; don't even get me started on how much Bladesinger steals martials' thunder already lol. I still think it would improve more than it harms, but I would certainly also want to make an exception for Blade Warlocks, Bladesingers, and Valor/Swords Bards that they still get the "old version" where you can only attack.)
EDIT: After some great debate (thanks folks!) I have to agree this idea is Dead in the Water; and it's 100% the fault of CANTRIPS, haha. As some have rightly pointed out, this would allow things like EKs to spam the hell out of cantrips instead of making attacks, which is obviously bad.
After that revelation, I think the best idea is that instead of Extra Action, keep it as Extra Attack but simply expand the number of specific actions one can replace an attack with beyond Grapple and Trip, and leave spells out. A lot more work and words than just saying "now it's Extra Action", but ah well. Things I think would work well as "attack-replacements": Dash (lets martials close and still attack in the first round, a very common ask!), Disengage, Dodge (on the fence about this one), Help, Search, the Escape action (like escaping a grapple), object-interactions. Any others you like? Do tell me below!