I say this a lot on threads like this, but please don't feel that you need to express or mixed feed so that your DH can 'help out'.
It is amazing how often on here you see well meaning men saying that the want to help out with feeds, leading to a more complicated regime for the mum (e.g. if you are giving an expressed bottle, obviously you also need to express when the bottle is being given, or ideally around that time, so the bottle is work for you and not giving you a break from that feed. All it might really be doing is moving the timing of the work around!).
If ff, mixed feeding, expressing or bf is right for you then that is great. Do what suits.
But if you solely bf and your DH changes, winds, settles, cuddles, brings drinks and tv remote controls, etc, guess who will be spending most time with the baby?
Also, too often, the 'helping' with bottles peters out once the dad is back at work. Or, also, men think they have 'done their bit' by giving the bottle and don't 'see' all the other jobs a baby needs. Not saying your DH is like this, but I see it alarmingly often, both in real life and on here.
Where I think expressing can help is once bfing is established sometimes expressing a bottle for the first night feed then getting an early night, leaving your partner on duty, can get you a nice chunk of uninterrupted sleep.