Vidar is a lit unit. I was oogling the protoype model of it hard trying to figure out what colors I would like on it before it thoroughly debuted. As a fencer, I do love how it's a fencing based unit, and he has duel pistols. What's not to love? Kimaris-Vidar is ugly. Only cool thing it has is the knee-cap hidden drills.
IBO though was just... different. It was refreshing after years of baby gundam to finally get something that was meaty and not a watered down bottle of formula. I enjoyed Unicorn, but the ending to that was just bullshit. I loved Build Fighters soley for the idea behind it... and also because Build Fighters was amazing in terms of characters and writing. Try and DIver though suck. Only good thing about try is the Gyancelot and R-gyagya. Because Gyan is my favorite mobile suit. But anyway, you had those that only had a threat of "meh models" which... as modeler I get, but the weight of it isn't as severe. AGE was just kinda childish and it felt more super robotty, G Reco made me feel mental handicap. So then comes along IBO that follow absolutely NO prior formula to gundam. Hell I still say the first season felt like an RPG with them upgrading units based on what they found. You can pick out Barbato's weapons and armor from previous fights. The cast owned, even if Mika was kinda dull(but realistic because that kid was 100% autistic). IBO was full of plot twists you don't see coming. I've referred to it often enough as Gundam of Thrones because, it really is GoT: Gundam Edition. The only plot twist I called from the get go was Vidar's identity. From what Rustal says S2E1 it's a dead ass giveaway. Some of those deaths though, they either get you super emotionally, or catch you COMPLETELY off guard... like the... Do we have spoiler tags here? I don't want to list it but lets just say it's three gun shots and you likely screamed at the tv.