After i saw changes to ranger, that larian did, I had a thought, how can they make Pact of Blade valuable choice without implementing Hex blade
Pact of Blade is the worst pact possible for warlock in PhB. It is magic weapon, which is good on 3 lvl, that warlock can summon with bonus action. Or warlock can make a magic weapon his pact weapon, and summon it with bonus action.
This pact was pretty weak, until Hexblade came out. It made a small change to this pact only for his subclass, what made this pact great. Hexblade can add his Charisma instead of str\dex for rolls with any one handed weapon, and to any weapon that is created with Pact of Blade, if Hexblade choose this pact. Also, Hexblade has proficiency in med armor and shields,
I LOVE Hexblade(not only for Cha to weapon rolls, but it gave some impact). But, as far as I know, only PhB classes will appear in Baldurs Gate 3. So, maybe, Larian can add Cha to weapon rolls and med armor prof as base Pact of Blade feature, or maybe, as invocation.
Over all, vanilla Pact of Blade will be very disappointing. Some changes are needed to this pact