By going STR over both DEX and INT You’re giving up most if not all all benefits of being a bladesinger:
- Song doesnt work in medium or heavy armor
- Song adds INT to AC
- Extra Attack Cantrips use INT to hit (unless you’re GFB/BB), as do all your spell attacks and DC
- Song of Victory adds INT to weapon damage
- INT determines how many spells you have prepared
EK on the other hand loses very little from dropping INT, as it isnt required for much more than spell attack/DC which as noted is not the EKs strong suit despite it’s evocation school access. Honestly if you want to play a low Int Wizard there are better alternatives like Necromancer, Conjurer or Transmuter