The scout fighter looks like yet another take at a ranger, but one I'm personally more likely to use. For the Cavalier I might want some more feature related to social interaction, not just the horse part and a proficiency. Something along the lines of what the Banneret/Purple Dragon Knight got in SCAG or a new use of superiority dice.
The bard colleges seem nice, but "Tumble" might have a bit too many benefits compared to Rogue Cunning Action.
The bard colleges seem nice, but "Tumble" might have a bit too many benefits compared to Rogue Cunning Action.