Well I guess, upon application, they approved it?
They are not going to advise you really should be thinking about yourself first, and your DC in the light of your own [their DM] circumstances. That's not their role in getting involved in adoption proceedings.
They are also not necessarily right either, that the 2.4 family is beneficial, that they must have a df, for their well-being, etc. These are societal myths being perpetuated.
I don't see anything wrong with having a huge celebration if that's want you'd love, and feels right for you, the important matter is what it represents, honestly,for you...after your experiences
Any future DH would be very insulted to know this would be about erasing the previous DH. To try to top or somehow crown the other one, rather than deal with the pain and sadness the loss of all your hopes and dreams brings to you.
It has been a busy time, andandve years is not a long time to recover.
It would be worth working through your intentions here, and facing the pain of the past wedding and its losses. Maybe an NHS counselling referral for six.weeks?
Did you do the freedom programme? Really useful for moving forward, and follow up courses.