More NBT Control Over Projectiles

It'd be very helpful for mapmakers to be able to summon projectiles such as snowballs that deal damage (I can think of the "damage" nbt data for arrow that is already present) and arrows that can be rendered as different block/item models just like other projectiles such as snowballs, eggs, enderpearls (...) and would be nice if they could be made invisible as well.
For now it is quite difficult to create for example something that shoots a projectile, that is visually decent and is not buggy/limited by game mechanics. Snowballs are easy to make visually appealing since they can change the rendered item, but it is difficult to make them deal damage and in some cases not possible. Arrows are the exact opposite, just the possibility to make them invisible would be revolutionary on that.
Thank you for your attention and help.
Have a grat day!