Your ideas are stellar. They don't need any improving or changing, your ideas are what are making me give this a four. Cinematic excellence in the intro, cinematic drums, synthetic effects and atmosphere are so well put together.
The one thing holding you back is your mixing. There's no push or pull in the dynamics and the sidechaining effect around 2:22 onwards is far too much, it makes the drop sound empty.
To improve the drop (at 2:30) - you need to work on your bass. I can hear a bass but it's far too quiet and sounds like a sine wave. Learn to layer your synths, stack another bass on top of this one but not as deep to fill out the low end. Add something to fill up the midrange - chords or a second lead but deeper than the current one. The samples you've chosen are quiet poor too, the kick and clap sound like generic FL Studio basic ones. Look towards SampleMagic packs for higher quality drums to use and that will elevate your music! Introducing some Hi-Hats in the drop will help it sound fresh and keep things interesting.
Work on your build ups too. Automate a high-Pass filter from 0% to say, 20% just before it drops. Use snare rolls and uplifters/risers to build tension (youll even find these in sample packs like Vengeance Deep House 2 for example), rather than just a repeated kick drum. These things help take your music to the next level.
For the ending, a better way to finish a song other than turn the volume down is to take a huge reverb preset and automate the wet level, starting at 0% and fading upwards so the song blurs out and drowns in reverb rather than gets a bit quieter - another way you can take your track to the next level.
Hope some of these tips have helped! Keep working at it!