Yes, that's how the 6502's registers work: two inverters with pass transistors for hold and load. As you point out, the tradeoff is that the latch is no longer

Yes, that's how the 6502's registers work: two inverters with pass transistors for hold and load. As you point out, the tradeoff is that the latch is no longer clocked, so the latch doesn't help you do things synchronously.