Hopefully this is the last word on the subject, but if there's one thing I want people to take away from playing Bladesinger: you still mainly cast spells like a traditional wizard. Your melee is a backup. Think of the class like you would view and Illusionist or a Necromancer. Both of those classes have features that would make spells most PCs underestimate or overlook into liquid awesomeness. For example, Creation and upcasted Major Image are kind of a 'meh' spells in most wizards' hands, but in an Illusionist's hands they become soul-crushingly good.
You are in the same category of them. Your job as a Bladesinger is to find spells that most wizards would overlook or not use to their full potential (Transmute Rock, Web, Fear, Investiture of Stone, Globe of Invulnerability, Wall of Force/Stone/Ice, multi-day Simulacrum, Anti-Magic Field, etc.) and use them to bring the pain. The Bladesinger does not have a bad offense, but slapping a Blur or a Haste onto yourself when you're not concerned about spell slots and wading into melee isn't the best use of your abilities outside of the low levels.
If you want to be a gish and do megadamage, you'd be much better off as a Sorceradin or a pure Hexblade or even a Melee Cleric.
