First of all, you want to give condos +4 vs eagles, and +1 PA. Or the other option that’s about giving them just +1 attack. So the buffs themselves don’t look like a big deal, right? But we are talking about an imperial unit that is similar to champion without needing any real previous investment and also it’s shared with the team. Others already told you those buffs can be OP for certain civs but let’s see about the civs I mentioned at least. Your buffs + the fact that other civ bonuses can also apply:
Italians: a champion-like unit that has 80 hp, attacks faster, has 5/6 armor, +4 vs eagles, moves faster than huskarls and regular eagle warriors (not elite), has anti-gunpowder armor, and 14 attack. Alt: 15 attack.
Malians: a champion-like unit that has 80 hp, attacks faster, has 4/8 armor, +4 vs eagles, moves faster than huskars and regular eagle warriors (not elite), has anti-gunpowder armor, and 14 attack. Alt: 15 attack.
Japanese: a champion-like unit that has 80 hp, attacks a lot faster, 4/5 armor, +4 vs eagles, moves faster than huskars and regular eagle warriors (not elite), has anti-gunpowder armor, and 14 attack. Alt: 15 attack.
Aztecs: a champion-like unit that has 80 hp, attacks faster, 4/5 armor, +4 vs eagles, moves faster than huskars and regular eagle warriors (not elite), has anti-gunpowder armor, and 18 attack. Alt: 19 attack.
Burmese: a champion-like unit that has 80 hp, attacks faster, 4/5 armor, +4 vs eagles, moves faster than huskars and regular eagle warriors (not elite), has anti-gunpowder armor, and 17 attack. Alt: 18 attack.
Celts: a champion-like unit that has 80 hp, attacks faster, 4/5 armor, +4 vs eagles, moves faster than elite eagle warriors, has anti-gunpowder armor, and 14 attack. Alt: 15 attack.
Not to mention vikings, teutons and sicilians. So some civs would give you the possibility of fast infantry units that can fully deny the bonus damage from slingers and regular jaguar warriors/cataphracts (not elite), resist arrows, resist HCs, kill gunpowder super fast, shred elite eagle warriors, shred conquistadors, run away from cavalry and raid better than hussars, slow down cavalry thanks to +1 attack plus chieftains or the teuton armor bonus, destroy wood buildings very close to a regular huskarl thanks to faster attack rate, +1 attack plus the goth bonus, etc.
As for your buff to GCs, LoS is better for foot archers than meele armor. You can use that for both attack and defense. Glad you agree about reducing the elite tech cost though.
Because… that’s the point? The condo unit exists to counter gunpowder. And gunpowder is niche anyway, with few exceptions. Civs without champions use condos as an alternative because of their similar stats. Outside of that, they are mostly used while players are transitioning to champions as to not lose momentum. I see no reason to buff them and give them another role when italians already have champions and cavaliers.
If people want to buff them just for the sake of it, then at least change the team bonus to something else like trade carts cost A% cheaper and buff condos in a different and bolder way through the imperial UT.
Btw something that’s been on my mind is that increasing or reducing their extra infantry armor could be a way to balance them like you want. That’d be a cool option to analyze.