Is there any mutliday sightseeing pass for Milan that is a good value if we wanted to just get entry to museums and churches?
The Milano Card looks OK. Just the transport inclusion is not bad. 7 EUR for 1-day and if you just got a 24-hour transport pass it would be 4.50 EUR. 13 EUR for 2-day vs 8.25 EUR for a 48-hour transport only. Look what freebies and discounts are included.
http://www.milanocard.it/what-is-milanocard
https://www.atm.it/en/ViaggiaConNoi/TurismoMilano/Pages/Biglietti.aspx