Hell yeah, if Battlemaster was the vanilla fighter as first intended so you can choose another subclass and combat styles would improve with levels like the caster`s cantrips and the official Ranger would be the 2019 RR I´m sure many people will be happier playing martial classes. Not perfect, not comparable with other PNP games but it´s an improvement.
I get that 5e tries to be good to the lowest common denominator, but they could bring some combat manuvers from 4e to 5e as optional rules... So the game will be accessible and offers more diversity than "i attack". Give warcries from D2 barb can also help making martial classes less "i attack"
If you are playing a campaign, a one-shot... joking with your fellow players, roleplaying, taunting the enemies, having fun in the combat, you may not have a problem with playing a ... lets call it option-handicapped class like a fighter or a barbarian.
Warrior-types also usually have less support and utility options than other classes. Even the skill powerhouses of the rogues often cannot compete in utility with some wizard builds, so usually a Fighter often do not have much to offer outside combat if you compare it with other classes in D&D5e.
Since BG3 is going to be a videogame, and moreover, a multiplayer game and a Turn-based game (So you cannot put your fighters in autoattack to strike automatically instead of order them ATTACK, ATTACK ATTACK every turn) I concur with @SorcererVictor and @Sordak, I think some overhaul of the fighters would be needed to give them more options in combat than "I attack" for 50 h in the campaign because the rules of DND5e right now do not offer options outside homebrews.
