What I would say is think carefully about dispensing with rituals.
Rituals create boundaries, and recognise a transition into a different stage of the life course. As humans, we created them for a purpose.
I would argue funerals are not really about "saying goodbye". On a deeper level, they are more about recognising formally that something significant has changed, that life going forward will be different than how it was before, and that change being formally registered by a wider circle of people.
Not doing the funeral ritual does not dispense with the pain. It is a way for the living to face it, rather than tuck it away -- to face the "goneness" of death.
There is also a lot of evidence to suggest that humans cannot really process that a death has really occurred to a close loved one until they see a body. They need that visual closure.
I worry sometimes that we react to rituals that feel old-fashioned by chucking them out, rather than reforming them. There are lots of funeral directors who will work with a family to deliver a ritual that is not old-fashioned. My mother, for example, had a white wool coffin and a service at a local memorial chapel with poems and a eulogy written as though it was a fairy tale.
And her funeral was extremely painful, though there were moments of smiling. But it was necessary. It was a event that marked the transition between being a married man and a widower for my DF, and having a living mother and no longer having a living mother for me.
I would suggest that if you dispense with a funeral, you need to put something else of equal weight in place. The problem there is that a very alternative ritual with no real antecedents for that purpose may not be sufficiently resonant enough to hit the right psychological notes for attendees, and there are dangers of going somewhere that, at the moment you turn up, ends up feeling very inappropriate.