Since these are all acquired through separate civics (unlike autocracy/oligarchy/republic and democracy/fascism/communism), it's a pretty straightforward matter to just idly go through and take all three, netting the legacy bonuses for each.
Seems like that rather undermines the importance of choosing a government at that point in the game, because the way legacy bonuses work, their benefits are front-loaded. Although they increase over time, but it's such a slow gain that the lion's share of the bonus is up front. Weakens monarchy in particular, because it's a rung on the ladder to theocracy. So, if one civ stays monarchy and another goes into theocracy, they both have the legacy bonus towards envoys, but only the latter gets the faith discount.
Or am I misunderstanding how legacy bonuses work?
Seems like that rather undermines the importance of choosing a government at that point in the game, because the way legacy bonuses work, their benefits are front-loaded. Although they increase over time, but it's such a slow gain that the lion's share of the bonus is up front. Weakens monarchy in particular, because it's a rung on the ladder to theocracy. So, if one civ stays monarchy and another goes into theocracy, they both have the legacy bonus towards envoys, but only the latter gets the faith discount.
Or am I misunderstanding how legacy bonuses work?