The recharging-crit-bar thing is in VATS. The bar builds up by using VATS, and it's then used in VATS. We have no details yet about how crits work in regular combat. (someone has said that they saw a non-VATS crit happening in one of the combat videos.)
And that other comment of yours is silly. Each playthrough of the game is a separate entity. So unless your own personal character is both male and female, the character they're romancing are not bisixual (except for any particular companion who has dialogue/background that explicitly says they're bi.)
If you're playing a male character, they're attracted to males. If you're playing a female character, they're attracted to females. Two separate game states.
(additionally, it has nothing to do with "political correctness" and has everything to do with that frequent buzz-phrase "do what you want." i.e, it's about player freedom. And letting the player romance whichever companion they feel like. Now, whether or not that's a good thing w/regards to defining interesting NPCs, is a separate discussion. But it has nothing to do with being PC.)
Spoiler edit: an NPC that ends up turning you down, because they have a strongly defined personality, personal goals, and a character arc, can be more interesting in the end than one who's entirely orbiting around your character. Even if it is disappointing because you like them. >
....honestly, that complaint says more about you than it does about the game or the devs. 