Nope.
Nope.taking Booming Blade away from him like that is straight-up brutal.
If you read SCAG, it's a Wizard, Warlock, Sorcerer spell. OK, yeah, an Arcane trickster can take it. Our Arcane Trickster gnome doesn't have it and doesn't miss it.
On that we agree.It's not like it was OP on full-casters, which are the strongest classes in the game, so it didn't power creep the game in any way.
*Facepalm*If anything, it made not taking Booming Blade on Rogue a sub-optimal choice, but I didn't mind it that much since Rogue is a low-tier class.
The rogue is a well designed class for adventuring, and does well in all three tiers of play.