The only thing I'd change is Yriel. He's not the greatest character.
I'd swap him out for a vanilla autarch (if that's possible) and add a few scatter lasers/shurican cannons to the jetbikes so they can hang about at range if needed. They've only got marine stats at the end of the day and having to be within 12" to shoot the shurican catapults gets them uncomfortably close imo. That way they can objective grab and contribute to the game while they're doing it
I'd swap him out for a vanilla autarch (if that's possible) and add a few scatter lasers/shurican cannons to the jetbikes so they can hang about at range if needed. They've only got marine stats at the end of the day and having to be within 12" to shoot the shurican catapults gets them uncomfortably close imo. That way they can objective grab and contribute to the game while they're doing it