But you lose a feat I think? I'm only level 11 so still can't try it.
I do want Spell Sniper and War Caster on top of +2 CHA, so I think I'd have to lose spell sniper and EB / increased crit range for 1 or 2 wizard levels.
I only have 14 con on my sorc, but the only time I lose concentration is if I ger paralyzed or knocked prone.
I tried out blink, but going into blink form also drops concentration meh, it would be broken if it didn't.
If you make a half elf or human sorc though you can get 20 AC with 16 dex, I currently only have 18 as a drow. Or 21 AC with the +3 shield, but I'd want to use the +1 DC one.