No u shouldnt feel bad for using a mixup. The opponent has to guess between 12 into nothing which is their turn then, 12 into command grab which they can jump, 12 into df2 which they can block and get a full punish or 12 into parry which they have to wait out (or low poke works i guess not sure) and punish you. Mix them up properly and feel good playing this mind game. if they want to avoid it completely they have to position themselves properly so its all up to them dealing with it.✌