I note that one of those branches actually grows from a different place but it is what we see that counts and from the 'front', the side you have showed the tree from, they all appear from the same place so for all intents it is so.
Without seeing the tree in full 3d it is hard to make specific recommendations.
Sometimes just a slight change of viewing angle can make a big difference and I can see that in your photos. Maybe a change of angle will alleviate the visual problem of branches at the same place.
Maybe one of those side branches could be wired up to give a new apex. The rear one is very straight like the current apex and so looks a bit odd but it looks thin enough to wire to give some movement. Maybe that would help and if it does not appear to come from the same spot as the front branch that will also negate the visual problem.
Not all cascades need a living apex. The top could be a jin which can be carved to give movement and taper. I keep looking at the tree without the top and without the rear (left?) top branch. That would leave it with 2 cascading trunks - 1 long, one shorter. I can't fully appreciate the impact of that design without actually seeing the tree though.
Most important thing to remember is that there is never 1 'right' design for any tree. There will always be several possibilities and usually more than 1 will be good. If you cannot decide which is best it just means that all are equally good so it does not matter which option you go with
