The interesting thing about SCAG is it's either well or poorly designed; many of the character options lack much in the way of synergy, such that they're really tough to abuse. Bladesinger is a great example. It's flavorful, but mechanically weird: light armor basically just saves you a Mage Armor slot; extra attack conflicts with interesting cantrips; recommended weapons that make you want str, dex, and int. Although there are some things to like, it's either intentionally awkward, designed for multiclassing, so simply flavor-over-function.
The only power creep is Tiefling flight (although Aarakocra are a thing already), flat-out-better cantrips, and a ton of half-elf possibilities (don't underestimate that cantrip!).
The only power creep is Tiefling flight (although Aarakocra are a thing already), flat-out-better cantrips, and a ton of half-elf possibilities (don't underestimate that cantrip!).