bedir than
Full Moon Storyteller
A different path may be to allow the 1st Opportunity Attack to not count as a reaction, but just be free. This would be situational and allow other reactions that the character may have.
But by the same logic, with armor increasing AC and STR adding to bonus to hit, it's "absurd to rationalize powering through full armor on every one of them without any accuracy, and therefore it's very hard to buy that being strong will add to your attack rolls on EVERYTHING". No matter how accurate I am with a rapier that has no affect at all on my chance to attack with a longsword, and no matter how bad my aim and reflexes, as long as I throw hard enough my thrown javelin will connect.
While I have different reservations about it, STR only to hit is so unbelievable that some other ability that can credibly affect damage at least some of the time is way ahead of it.
Possibly the most absurd failure of the basic D&D weapons rules is the fact that a Strength 5 wood elf has no more trouble drawing a longbow than a Strength 15 half-orc. This is preposterous. I am guessing that bringing a longbow to full draw requires more upper body strength than I ever have had or ever will have (I'm probably around Strength 8-9).
..it'd be an issue, because there are INT based casters & 1/3rd casters who already need a lot of INT, which otherwise does nothing for combat - suddenly they could leverage it. And, those 1/3rd casters (EK & AT) are otherwise weapon-users...A fighting styles would have to be in the same spirit as the current ones, so you can't really make it INT-based. A feat could, but then anyone could take it, but maybe that isn't a bad thing? Sigh...
..it'd be an issue, because there are INT based casters & 1/3rd casters who already need a lot of INT, which otherwise does nothing for combat - suddenly they could leverage it. And, those 1/3rd casters (EK & AT) are otherwise weapon-users...
...oh, and Bladesingers...
I wonder if it might be better if the Int fighter style affected the initiative order?
Fighter-only combat style:
Tactician.
1. You may add your Int instead of your Dex to your initiative roll.
2. For every round beyond the first you are fighting the same opponent or group of opponents you increase your initiative by your Proficiency Bonus to a max of 25. This extra bonus is lost if you do not interact with the opponents for 1 round.
The cumulative addition of the Proficiency Bonus represents the PC 'reading' the opponents. If multiclassing is allowed then change the increase to a plain +2. The max of 25 comes from a d20 roll of 20 with a +5 modifier.